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Specs are compiled from manufacturer listings and verified buyer reviews and can change over time — please confirm the key details on the product page before buying.
If you want the short answer: buy a deadbolt that is keyed on both sides, made of solid metal, and rated by ANSI/BHMA (an independent US standards body that grades locks by how well they survive hammering, kicking, and prying). Then check one thing before you order — the thickness of your door and the backset, which is the distance from the edge of the door to the center of the existing hole. Get those two numbers wrong and even a great lock will not drop in.
I’m Mohammad Maruf — the founder and writer behind Gardening Beyond. This guide is built by comparing the manufacturers’ published specifications and the patterns across verified customer reviews, so you get each pick’s real strengths and trade-offs instead of marketing spin.
Every pick below is a true double cylinder — meaning a key is needed on the outside and the inside, so there is no thumb turn for anyone to reach through a window or a gate. That one design choice is exactly why so many of these locks end up on glass doors, garden gates, rentals, and homes with young children, and it is the reason this double cylinder deadbolt comparison exists.
Our Picks at a Glance
How To Choose The Best Double Cylinder Deadbolt
Buying a deadbolt looks simple until you read the listing and see five different numbers. Here is what actually matters, in the order that will save you a return.
Start with the two fit numbers, not the finish
Measure your door thickness and your backset first. A backset is the distance from the edge of the door to the middle of the big hole already drilled through it. Most homes use a 2-3/8-inch or a 2-3/4-inch backset, and a lock listed as fitting both will drop into either without new drilling. Door thickness is the second number — a lock built for a 1-3/8-inch door will not sit flush on a 1-3/4-inch door, and the bolts included with it may be too long or too short to close the two halves together.
Then check the security grade
ANSI/BHMA grades run from Grade 3 (basic residential) up to Grade 1 (the toughest residential rating). Grade 1 locks are tested against crowbar, hammer, wrench, saw, lock pick, and kick-in attacks. Grade 3 covers normal household use. Both are real deadbolts — the difference is how much punishment the bolt, the cylinder housing, and the mounting hardware are built and tested to absorb.
Decide if you want one key or many
A keyed-alike set means several deadbolts open with the same key, which is a big deal for gates, side doors, and rental units. A per-unit key set means each lock comes with its own unique key, so a copied key cannot open your neighbor’s door or another unit in the building. Both are legitimate choices for different reasons, and the listings below make it clear which is which.
Know the safety trade-off before you buy
A key on the inside is more secure against theft, but it also means you cannot get out of that door without finding the key in a hurry — during a fire, for example. Many homes pair a keyed-inside deadbolt with at least one other exit door that opens freely from the inside. Think about your household before you commit.
Quick Comparison
| Model | Best For | Security Grade | Keying | Finish | Amazon |
|---|---|---|---|---|---|
| SCHLAGE B62N505 Deadbolt★ Best Overall | Max residential security | ANSI/BHMA Grade 1 | Keyed both sides | Bright Brass | Amazon |
| Kwikset 985 SmartKeySmartKey Pick | Rekeying without a locksmith | ANSI/BHMA Grade 1 | Keyed both sides | Polished Brass | Amazon |
| Gobrico Oil Rubbed Bronze 2-PackBest Multi-Door Set | Two doors on one key | Meets Grade 3 | Keyed alike (2 locks, one key) | Oil Rubbed Bronze | Amazon |
| Probrico Satin Nickel | Unique key per lock | ANSI Grade 3 | Individual key per unit | Brushed Nickel | Amazon |
| Lock Scout Square Trim | Matte black modern doors | Residential standards | Keyed both sides | Matte Black | Amazon |
| Gobrico Satin Nickel 2-Pack | Two gates on one key | Meets Grade 3 | Keyed alike (2 locks, one key) | Satin Nickel | Amazon |
| Design House 782771 | Budget one-off replacement | ANSI Grade 3 | Keyed both sides | Polished Brass | Amazon |
In‑Depth Reviews
1. SCHLAGE B62N505 Deadbolt, Keyed 2 Sides, Bright Brass
Our pick — over 4.5★ from 500+ verified ratings; the strongest balance of quality and price.
The one that takes a crowbar and shrugs it off.
If your reason for buying a double cylinder deadbolt is that you are done losing sleep over the back door, this is the lock to start with. It carries ANSI/BHMA Grade 1 — the highest residential security rating — which means it has been tested against crowbar, hammer, wrench, saw, lock pick, and kick-in attacks, not just ordinary turning. That is the whole point of paying more for a deadbolt: the steel inside the cylinder housing and the bolt that drives into the frame are built heavier than the cheap ones.
Schlage also makes installation about as painless as lock work gets. A Snap ‘n’ Stay design holds the deadbolt in place while you line up the screws, so you are not holding two halves of a lock together with your chin. It is built for standard door prep, so it fits existing pre-drilled holes, and it comes with installation hardware and instructions. The extra-long jamb screws in the box are there specifically to resist a forced entry — they drive deep into the framing stud, not just the soft wood of the door edge.
The honest catch is the connecting bolts. They arrive sized for a door thicker than 1-3/8 inches, so on a standard thin interior-hollow door you will be cutting roughly a quarter inch off each bolt before they will seat. It is a five-minute job with a hacksaw, but it is a job. And if you ever want to change the key, rekeying this cylinder properly takes about a quarter hour and a rekey kit — a homeowner can absolutely do it, but as buyers report, “not easy without proper tools.”
Why this is the top pick
- Grade 1 rated, the toughest residential security class — built and tested against picking, prying, sawing, and kick-ins
- Snap ‘n’ Stay design keeps the bolt positioned while you fasten it, so a one-person install is realistic
- Solid brass construction with a bright brass finish and a limited lifetime mechanical and finish warranty
- Fits standard pre-drilled holes, so upgrading an old deadbolt usually means no new drilling
What to plan around
- Included connecting bolts run long — expect to trim about 1/4 inch off each for a 1-3/8-inch door
- Rekeying takes roughly 15 minutes and a kit; it is a homeowner job, not a twist-of-the-wrist job
- No thumb turn on the inside, so this door is not a fast exit route without the key
Pick this when: you want the strongest residential rating available and you are protecting a front door you rarely need to flee through without a key.
Think twice if: you are fitting a 1-3/8-inch door and do not want to trim bolts, or you want to swap keys without a rekey kit.
2. Kwikset 985 Double Cylinder Deadbolt featuring SmartKey in Polished Brass
Rekey it yourself in seconds — no locksmith, no new cylinder.
Here is the feature that decides this purchase for a lot of people: SmartKey re-key technology lets you change which key opens the lock yourself, in three steps, in seconds, using the existing key and a small tool. If a key goes missing or you take over a rental, you can rekey it yourself in seconds instead of paying a locksmith. Re-keying is the second-most-praised thing about this lock by a wide margin, and once you have lived with a rekeyable lock you tend not to go back.
It is also a Grade 1 lock, certified by ANSI/BHMA at the highest residential level, and the design includes an extra pin that blocks the quick “bumping” trick people use on cheap cylinders. It ships with a fully adjustable latch and deadbolt, so it fits all standard door preparations, and it is meant to be paired with a matching knob, lever, or handleset if you are doing a whole door. The polish on the brass is a showpiece finish that suits a traditional front door.
Two things to weigh. First, polished brass is the softest-looking of the common finishes and it does wear over years of handling — no worse than any polished brass, but worth knowing. Second, this lock will not work in a master-key setup unless you step up to Kwikset’s Smart Master line, so if you need one key to run an entire building with a master, look elsewhere. One unit did freeze up in the cold for a buyer, but the maker replaced the double lockset free within two days, which says plenty about the support behind it.
Made for: landlords, new homeowners, and anyone who wants to change keys on their own schedule without paying a locksmith.
Look past it if: you need master-keying across a whole building, or you want a finish that stays bright under heavy daily handling.
3. Gobrico 2 Keyed Alike Double Cylinder Deadbolts with Same Key, Oil Rubbed Bronze
Two heavy doors, one key, six copies of it.
For a house with a front door and a side gate, or a garage entry and a back door, two locks that share a single key is a bigger quality-of-life upgrade than any finish. This set gives you two double cylinder deadbolts keyed alike on both sides, plus six keys — three per bolt — so every household member can carry one and you still have spares. Both locks open from the outside and the inside with that same key, which is what makes it a true double cylinder rather than a half-measure. The oil rubbed bronze finish is the other draw; it is a warm, dark, antiqued look that suits brick and wood doors and hides fingerprints far better than bright brass.
These meet grade-3 residential security standards and are tested by ANSI to confirm it, and the body is stainless steel that is built not to rust or deform. The maker also stands behind them with a replacement or refund on any quality problem — note, because it means a hardware glitch is a message away from being fixed. Several buyers found the second lock goes in much faster with somebody holding the assembly while you drive the screws.
The trade-off to accept up front is material weight. The metal housing here is thinner than the name-brand competition, and the mounting screws are noticeably slimmer. Buyers put it plainly: “The metal housing is thinner than competition, the screws to hold it in place are super thin but it works.” Two locks on one key for a fraction of two separate premium deadbolts is a genuine value proposition — just understand that it is a value proposition, not a Grade 1 fortress.
What the finish delivers: oil rubbed bronze over stainless steel gives you a rust-resistant, fingerprint-friendly lock that looks like it cost far more than it did.
And the one limitation: the housing and screws are lighter-gauge than premium brands, so if you want a single door to be as tough as possible, put your money on the Grade 1 pick instead.
Best for: matching two entry points on one key without buying two premium locks, especially where the door finish is dark wood or brick.
Less ideal for: a single door where every ounce of forced-entry resistance matters most.
4. Probrico Satin Nickel Double Cylinder Deadbolt, Keyed Both Sides
Every lock gets its own key — which matters more than you think.
Big-box-store deadbolts in the same batch often share a keyway, meaning a key that opens your lock might open the one down the hall. This unit goes the other way: each deadbolt ships with its own individual key, so no second lock anywhere carries the same pattern. For anyone renting, sharing a building, or just wanting a key that cannot be casually duplicated into a neighbor’s door, that is the headline. It is also a straightforward double cylinder — locked and open up with a key on both sides.
The hardware itself is zinc alloy, which is chosen here partly because it resists fingerprints and does not grime up the way softer finishes do, so the satin nickel stays clean-looking. It meets ANSI Grade 3, the entry-level residential rating, and Probrico rates it for more than 200,000 open-and-close cycles. Installation runs through the included parts — deadbolt, latch, strike plate, screws, and keys — so one person can handle it without help, and it fits both right and left-handed doors.
On a 16-ounce lock, the build lands firmly in the mid-tier: sturdy enough for a front door, a bedroom, or an interior door where you want a keyed both-sides lock, but not the overbuilt monster the Grade 1 pick is. Buyers describe it as heavy-duty and sleek, and the peace-of-mind angle comes up most often. The trade-off is simply that zinc alloy and Grade 3 hardware will not shrug off a determined forced entry the way a fully brass Grade 1 body does — that is physics, not a defect.
The defining detail: individual keys per lock mean a duplicated key stays useless on any other lock, which is exactly what renters and apartment dwellers want.
The one honest limit: Grade 3 and zinc alloy make this a solid everyday lock, not a fortress against a sustained attack — budget accordingly for a high-risk door.
Reach for this if: you want each lock to carry its own key and you like the clean look of satin nickel on an interior or front door.
Not for you if: you need one key to open a whole set of doors, or you want maximum forced-entry resistance on a single critical door.
5. Lock Scout Deadbolt with Square Trim, Keyed 2 Side, Matte Black Finish
A matte black square-trim lock that matches a modern door instead of fighting it.
The reason to pick this one is aesthetic before anything else: a square trim plate in matte black sits cleanly on contemporary doors, and a lot of double cylinder locks only come in round polished finishes. If your door hardware is already matte black, dropping a bright brass deadbolt onto it looks like a mistake. This one is keyed on both sides, made of zinc, and reviews note it installs with just a screwdriver using the included hardware and parts.
Its strength in the reviews is broad satisfaction — the deadbolt works as intended, the finish looks right, and it fits existing doors. One interesting thread is practical: several buyers picked it specifically to keep a wandering child or adult family member from opening a door, which is where a keyed-inside lock earns its keep. It is also a plain, standard-size lock that swaps in for a worn-out existing deadbolt without changing your door prep. Buyer reviews mention how easy it is to install; the buyer of one review sums it up with “very hard to install,” so expect some variation depending on your door.
The trade-off is quality consistency. Buyers split on this one — some find it sturdy and worth every bit, while others found a rare unit that failed within a couple of months and had to bring in a locksmith. That is a real risk on a budget-tier lock, and the safest move is to test the bolt action the moment it arrives and return anything that feels off, rather than waiting. Price and finish are the draws here; premium-grade internals they are not.
What seals the deal: a matte black square trim that matches modern door hardware, plus keyed-both-sides security in a compact, screwdriver-friendly package.
Where to be careful: quality is the most-discussed aspect and the verdict is mixed, so check the bolt action the day it lands and lean on the return window if anything feels rough.
Right call for: a modern front door where matte black hardware is the look you are committing to.
Hold off if: you want Grade 1 internals and cannot stomach any chance of a dud — pay up for the Schlage in that case.
6. Gobrico 2 Keyed Alike Double Cylinder Deadbolts, Satin Nickel, 2 Pack
Two gates, one key — the garden-door special.
Garden gates are exactly where a double cylinder deadbolt earns its place, because a single-cylinder gate with a thumb turn on the inside is trivially easy to reach over and open from the wrong side. This pair solves that: two double cylinder deadbolts, both keyed alike on both sides, six keys total, satin nickel, stainless steel bodies. The obvious use case is a front and back gate that you want to open with the same key so you are not shuffling a keyring every time you step outside.
Where buyers get tripped up is the assembly step. Because these are keyed on both sides, you can install one lock with the interiors flipped and end up with a bolt that never turns. The instructions cover the correct orientation, and owners mention reading them before screwing anything down prevents the mistake. A second pair of hands speeds up the alignment step. Beyond that, the appearance and the value are what people keep coming back to — one reviewer notes these are noticeably better than expected for the low sticker.
There are two small quality notes to file away. Occasionally a set ships with one mismatched screw — a larger diameter with interrupted threads — which is easy to swap out and the maker will replace on request. And the finish is a satin nickel that looks great but is not the heaviest-gauge hardware on the market. Both are minor against the value of two locks on one key for the price of one decent brand-name deadbolt.
Where it shines: two keyed-alike double cylinder deadbolts for gate pairs, both opening on the same key so your keyring stays short.
The known quirks: read the instructions before assembly — a flipped interior on install leaves the bolt stuck — and check that the screws in the box match, since a mismatched set does ship occasionally.
Buy it if: you have two gates or side doors and want them both on one key without paying brand-name prices.
Pass if: you want an entirely simple to use first install — the keyed-both-sides assembly has a right way and a wrong way, and you must get it right.
7. Design House Double Cylinder Deadbolt Lock, Polished Brass, 782771
The drop-in replacement that fits almost any door — if the price is all that matters.
If you just need one deadbolt that will physically fit your door, this is the most forgiving option here on paper. It fits both a 2-3/4-inch and a 2-3/8-inch backset, and it works on 1-3/8-inch and 1-3/4-inch thick doors, so you can order it without measuring and it will likely drop in. It is ANSI Grade 3 certified for residential security, comes with a five-year limited mechanical and five-year limited finish warranty, and it will go on a left or right hand door. At 1.3 pounds it is a practical, ordinary deadbolt rather than a heavy one.
Reviews on the fit and the ease of a straightforward install are genuinely encouraging — one buyer reports installing it themselves in about ten minutes, and several describe it as secure and worth the money. The polished brass finish matches traditional doors, and because the lock is a standard size, it replaces a tired old deadbolt without drilling new holes. For a single rental unit or a quick one-door swap, the low entry price and wide fit range are the entire case for it.
Be clear-eyed about what you are getting. Quality is the most-discussed aspect and it is genuinely mixed — some find it good, others describe it as cheap. A few customers note the keys can stick after install and one found the set screws difficult to thread, though the fit and finish were fine. These are isolated gripes, not a pattern, but they do map onto the Grade-3 price point. If you want a rock-solid primary door lock, spend more; if you want an inexpensive, easy-fit replacement, this is a reasonable choice — just be ready to return it if the cylinder feels stiff from the start.
The value case: a wide backset range and a standard-size body mean it drops into most existing door prep without modification, plus a five-year mechanical warranty.
The fair warning: quality is a mixed bag at this tier, and a handful of buyers reported stiff keys after install — test the bolt immediately and use the return window if it feels wrong.
Best suited to: a single door swap on a tight budget where you want maximum fit flexibility and do not need Grade 1 security.
Step up instead if: this is the main entry to your home and you want the strongest cylinder and mechanism available.
Understanding the Specs
ANSI/BHMA Grade 1, 2, and 3
ANSI/BHMA is an independent standards body that grades residential deadbolts by how much abuse they survive. Grade 1, the top residential rating, means the lock has been tested against crowbar, hammer, wrench, saw, lock pick, and kick-in attacks. Grade 3, the entry-level residential rating, covers normal household use. When both grades show up in the same shopping list, the honest read is that Grade 1 is overbuilt for a high-risk door and Grade 3 is fine for a bedroom or an interior door — the right pick depends on how exposed that door is.
Backset and door thickness
Backset is the distance from the door’s edge to the center of the existing hole, and it is almost always either 2-3/8 inches or 2-3/4 inches. Door thickness is the second must-check number, and homes use 1-3/8-inch or 1-3/4-inch doors as the two common sizes. A lock that lists both backsets and both thicknesses on its specs is the safest one to order sight-unseen, because it can be installed into standard pre-drilled holes without new drilling. Getting these wrong is the number-one reason deadbolts get returned.
Keyed alike vs. keyed separately
Keyed alike means several deadbolts share one key, which is the right call for gates and multiple doors you want to open with a single key. Keyed separately means every lock comes with its own unique key, so a copied key cannot open another unit — useful for renters and shared buildings. Neither is better in the abstract; it depends on whether you value convenience or isolation of keys. Most homes choose keyed alike for their own doors and keyed separately for anything they rent out.
Rekeying vs. replacing
Rekeying changes which key opens a lock without swapping the lock itself. Some locks, like Kwikset’s SmartKey line, let you rekey in seconds with a small tool; others take a locksmith or a rekey kit and about a quarter hour. If keys change hands often — a tenant moves out, a contractor keeps a key — a rekeyable lock pays for itself fast. Otherwise, a strong fixed-cylinder lock is the simpler choice.
FAQ
What is a double cylinder deadbolt, exactly?
Is a keyed-on-both-sides deadbolt safe to have on a front door?
Will this fit my door without re-drilling?
Should I buy keyed alike or separate keys?
What is the difference between Grade 1 and Grade 3 deadbolts?
Can I rekey a double cylinder deadbolt myself?
Do double cylinder deadbolts work on gates and exterior doors?
How do I know my new deadbolt will hold up over time?
Which finish should I choose?
Are double cylinder deadbolts harder to install than single cylinder ones?
Final Thoughts: The Verdict
For most homes, the double cylinder deadbolt worth owning is the SCHLAGE B62N505 — it is the only pick here rated ANSI/BHMA Grade 1 at that level of build quality and reputation, with the Snap ‘n’ Stay install and the long jamb screws that resist a pry. If being able to rekey the lock yourself in seconds matters more than a fixed cylinder, grab the Kwikset 985, which also carries Grade 1 and adds SmartKey re-keying. And for two gates or side doors you want on one key without paying brand-name prices, the Gobrico oil rubbed bronze two-pack is the smart value move. Whichever way you go, the one thing not to skip is checking your backset and door thickness before you order — that single step saves almost every return.
How We Picked
We do not accept paid placement. Every pick is matched to a real buyer and a real use-case; we do not hands-on test units.
Sources & Methodology
Specifications: manufacturer listings and product documentation. Review insights: verified customer reviews, as of September 2026. Pricing: not shown on this page (it changes often); check the current price via the retailer link.
As an Amazon Associate, Gardening Beyond earns from qualifying purchases. This does not affect which products we feature.