When a screw head is stripped, rusted, or so damaged that no screwdriver can grip it, you still have several reliable ways to get it out. The right method depends on how badly the slot is damaged, whether the screw head is still intact, and what tools you have on hand. Here are the techniques, ranked roughly from simplest to most involved.
The Rubber Band Trick
This is the easiest method and the one to try first. Place a wide rubber band flat over the damaged screw head, then press your screwdriver tip into it. The rubber fills the gaps where metal has worn away, creating enough friction for the driver to catch. Turn slowly with firm downward pressure. An industrial-quality rubber band works better than a thin office one because it’s thicker and less likely to tear. This works best when the slot is partially stripped rather than completely gone.
Abrasive Compounds for Extra Grip
If a rubber band doesn’t provide enough bite, valve grinding compound takes the same idea further. This gritty paste, available at any auto parts store, creates a rough surface between the screwdriver tip and the screw head. Apply a small dab to the damaged slot, seat your screwdriver, and turn with steady pressure. The abrasive particles dig into both metal surfaces and resist slipping. Aviation friction drops (sold as “E-Z Grip” or similar) work the same way. Either option is worth keeping in a toolbox for future stuck fasteners.
The Center Punch Method
For screws where no slot remains at all, a center punch and a hammer can create rotational force without any slot. Place the tip of a center punch off-center on the screw head, angled slightly to the right. Tap it gently with a hammer so each strike pushes the screw counterclockwise. You’re essentially walking the screw around in tiny increments. Once it’s loosened even a quarter turn, you can usually grab it with pliers and spin it the rest of the way out. This technique requires patience and light taps. Hitting too hard can damage the surrounding material or snap the screw.
Locking Pliers on an Exposed Head
If any part of the screw head sits above the surface, locking pliers (commonly called Vise-Grips) give you a direct mechanical grip. Clamp them onto the screw head as tightly as possible, then turn counterclockwise. The locking mechanism maintains constant pressure so the jaws don’t slip while you rotate. For even better results, specialty extraction pliers from brands like Vampliers or Engineer have jaws specifically shaped to bite into rounded or damaged screw heads. These are a worthwhile investment if you deal with stripped fasteners regularly.
Cutting a New Slot
A rotary tool (like a Dremel) with a thin cutting disc can carve a fresh slot across the top of a damaged screw head. Cut a straight line deep enough for a flathead screwdriver to seat firmly, usually about 1 to 2 millimeters. Then use the largest flathead driver that fits the new groove and turn normally. This works well on screws in accessible locations where you have room to maneuver the cutting tool. A hacksaw blade can do the same job if the screw is in a spot where you can reach it with a straight stroke.
Screw Extractors
When simpler methods fail, a dedicated screw extractor is the most reliable tool for the job. These are hardened steel bits with reverse-threaded spirals that dig deeper into the screw the harder you turn. Here’s the process:
- Drill a pilot hole. Use a standard drill bit slightly smaller than the screw diameter. Center it carefully on the screw head and drill straight down into the screw itself. For a 10mm screw, a 5mm drill bit is typical.
- Insert the extractor. Place the spiral end of the extractor into the pilot hole.
- Turn counterclockwise. Because the extractor has a left-hand thread, turning it counterclockwise drives it deeper into the screw while simultaneously loosening the screw from its hole.
- Use a wrench for leverage. Grip the top of the extractor with an adjustable wrench or tap wrench and keep turning until the screw backs out.
Extractor sets are sold in numbered sizes. A number 1 handles screws from 5 to 8mm, a number 2 fits 10mm screws, and larger sizes go up from there. Most home improvement stores carry sets that cover the common range.
Left-Hand Drill Bits
A left-hand drill bit is a clever shortcut that sometimes removes the screw before you even get to the extractor step. These bits spin in reverse compared to standard bits. As the bit drills into the screw, all of its torque pushes the screw counterclockwise. Drilling also heats the screw and relieves the internal stress holding it in place. In many cases, the screw simply spins out while you’re drilling the pilot hole, saving you the extra step of using an extractor. If it doesn’t, you’ve already got your pilot hole ready for one.
Penetrating Oil for Rusted Screws
Corrosion is often the real reason a screw won’t budge, regardless of whether the slot is damaged. A penetrating oil like PB Blaster works its way into the microscopic gaps that rust always creates between the screw threads and the surrounding material. Spray it on and give it at least 15 minutes to work. For seriously rusted fasteners, applying it the night before and letting it soak overnight is significantly more effective. Reapply two or three times during that period. Penetrating oils don’t evaporate quickly, so each application builds on the last. This step pairs well with any of the mechanical methods above.
Heat as a Last Resort
When nothing else works, heat can break the bond between a seized screw and the material around it. The goal isn’t simply to expand the screw. It’s to heat the screw and its surrounding material at different rates so the joint loosens. A propane torch or heat gun applied directly to the fastener until it glows a dull red, then allowed to cool completely, often breaks it free on the next attempt. If that doesn’t work, heat it again to a medium red and try turning it while it’s still hot.
For an even more aggressive approach, heat both the screw and surrounding area, then touch an ice cube to just the screw. The rapid cooling shrinks the screw while the surrounding material is still expanded, creating a gap between the two. This thermal shock technique is common in automotive work where fasteners have been corroded in place for years. Obviously, only use heat on metal-to-metal joints. Wood, plastic, and electronics will not survive this treatment.
Choosing the Right Method
Start with the least destructive option and work your way up. A rubber band or grinding compound costs nothing and takes 30 seconds. Locking pliers or a center punch work when the head is still accessible. Cutting a new slot is quick if you own a rotary tool. Screw extractors handle the toughest cases but require drilling into the screw, which adds risk of snapping the extractor inside the hole if you’re not careful to keep the drill straight and use moderate pressure. Penetrating oil should be your first step whenever rust is involved, applied well before you attempt any removal technique.