A few good home methods can remove a broken-off screw — pliers for exposed ends, left-hand drill bits.
That sudden snap when the screw head pops off is one of the more frustrating moments in any DIY project. The fastener is locked in place, the screwdriver has nothing to bite into, and the work piece has a shallow hole that seems impossible to fix without damaging everything around it.
There is no single perfect solution for every broken screw. The method that works depends on whether the break is in wood or metal, how much screw remains above the surface, and what tools you have on hand. This guide covers the most reliable techniques so you can pick the approach that best fits your specific situation.
Assess The Break First
Before grabbing any tool, take a close look at how much screw is left. A partially exposed stub can often be twisted out with a small pair of pliers — grip it close to the surface and turn counter-clockwise slowly.
A flush break, where the screw breaks level with or just below the surface, requires a different approach. You will need to drill into the screw itself to create a starting point for removal tools.
The material matters too. Wood screws tend to give way under corrosion or over-tightening, while metal fasteners in steel or aluminum often snap under shear stress. Each material responds best to slightly different removal tactics.
Why The Wrong Tool Makes It Worse
Many DIYers reach for the biggest screwdriver or the first drill bit they find, hoping brute force will do the trick. That impulse often turns a manageable repair into a deeper headache.
Drilling off-center, using the wrong bit size, or skipping a center punch can leave the broken screw even more stuck. A few seconds of preparation saves a lot of frustration later.
- Pliers and vice grips: Best for screws that stick out 1/8 inch or more. Grip firmly near the surface and twist slowly to avoid snapping the stub shorter.
- Screw extractor kit: A set of tapered, left-threaded tools that bite into a pre-drilled pilot hole. Match the extractor size to the screw diameter for a secure hold.
- Left-hand drill bits: These spin in reverse and can sometimes back the screw out on their own during drilling, eliminating the need for a separate extractor.
- Tube-style extractor: A hollow bit with saw teeth that cuts a ring around the buried screw in wood. The screw comes out with the plug, and the hole gets filled with a dowel.
- Dowel replacement: If extraction fails in wood, drill the entire screw out, glue in a wooden dowel, and re-drill a fresh pilot hole.
Each method has a best-use scenario. Pliers are fast for shallow breaks; extractors and left-hand bits handle flush breaks in metal or wood. Tube extractors are a great backup for deeply buried wood screws.
Step-By-Step: Screw Extractor Basics
The screw extractor is the tool most people picture for this job, and for good reason. It works on both wood and metal, and a single kit covers several screw sizes. Lowes walks through the steps for using a screw extractor tool, starting with drilling a pilot hole in the center of the broken fastener.
Here is a quick reference table for selecting the right bit and extractor size based on common screw diameters.
| Screw Diameter | Pilot Bit Size | Extractor Size |
|---|---|---|
| #4 (small) | 1/16 inch | #0 or #1 |
| #6 – #8 (medium) | 3/32 inch | #1 or #2 |
| #10 – #12 (large) | 1/8 inch | #2 or #3 |
| 1/4 inch bolt | 5/32 inch | #3 or #4 |
| 5/16 inch bolt | 3/16 inch | #4 or #5 |
Match the pilot bit to the extractor, not to the full screw width. The hole needs to be deep enough for the extractor’s tapered tip to bite firmly. A shallow pilot hole causes the extractor to slip and may break it.
Four-Step Process For A Flush Break
Flush breaks are the toughest because you cannot grip anything above the surface. A left-hand drill bit is often the first tool to try here, as its reverse rotation can grab and back out the screw on its own.
- Center punch the screw: Tap a center punch into the exact middle of the broken screw surface. This creates a small divot that guides your drill bit and prevents wandering.
- Select a left-hand drill bit: Choose a bit slightly smaller than the screw shaft. Set your drill to reverse (counter-clockwise) and apply slow, steady pressure with cutting oil on metal surfaces.
- Drill the pilot hole: If the left-hand bit backs the screw out, you are done. If not, the pilot hole is now ready for a screw extractor.
- Insert and turn the extractor: Tap the extractor lightly into the pilot hole, then turn it counter-clockwise with a tap wrench or driver handle. The left-hand thread bites in and pulls the screw upward.
Cutting oil is worth the extra step when working with metal fasteners. It reduces friction, keeps the bit cool, and lowers the chance of snapping the drill bit inside the screw.
When Pliers Are All You Need
Not every broken screw needs a trip to the hardware store. If a small nub of screw still sticks out above the surface, a common technique is to grip the screw with pliers, as Instructables demonstrates in its remove with pliers guide. Grip as close to the surface as possible for the most leverage.
Locking pliers (vice grips) work even better because they clamp firmly without slipping and free up both hands for steady turning. A slow, twisting motion is safer than jerking the screw, which could snap it shorter.
For screws embedded in wood or soft metal, pliers often do the whole job. For stubborn steel fasteners, pliers can at least confirm whether the screw is seized before you escalate to drilling and extraction.
| Tool | Best When |
|---|---|
| Needle-nose pliers | A small stub is visible above the surface |
| Locking pliers / vice grips | You need a secure, hands-free grip |
| Screw extractor | The screw is flush or below the surface |
| Left-hand drill bit | You want a one-tool solution for flush breaks |
The Bottom Line
Start with the simplest method — pliers if you can grip the stub, a left-hand drill bit if the break is flush. Move to a screw extractor only if the first attempt fails. Most DIYers who skip to extraction without trying pliers or reverse drilling end up making the hole larger than needed.
If the screw is in a load-bearing structure or a valuable piece of furniture and none of these techniques work cleanly, a professional handyman or a local machine shop has the experience and tools to remove the fastener without damaging your project.
References & Sources
- Lowes. “Remove a Stripped or Broken Screw” A screw extractor is a specialized tool designed to grip the inside of a broken screw so it can be turned and removed.
- Instructables. “Removing a Broken Screw” For a broken screw with a partially exposed head, you can grip the exposed portion with a small pair of pliers and gently twist it out.
