Locking pliers grip and clamp work with a locking mechanism. Screw‑adjusted versions set the fit and pressure with a screw at the handle.
Typical applications
- Straight‑jaw locking pliers are suitable for flat or square work; select the jaw shape to match the workpiece.
Advantages
- Screw‑adjusted locking pliers allow the adjustment to be retained for repetitive work. The adjustment is not a measured clamping‑force specification.
Specifications to check
- When selecting locking pliers, check the jaw shape, opening size, and the release mechanism. Some designs feature a trigger release.
Limitations
- For ordinary nuts and bolts, use a correctly fitting wrench rather than pliers that can round their corners.
Buying considerations
Inspect the jaws and mechanism before use. Replace pliers with worn teeth, and choose an opening that allows a comfortable grip.
Safety & limits
- Cushion grips on generic locking pliers do not provide electrical insulation. They should not be used as a hammer, and handle extensions for extra leverage should not be added.
Sources & further reading
These links document the information used in this article. Manufacturer specifications and source research are not hands-on test results or an endorsement of a purchase.
- CCOHS: Hand tool guidance
Reference checked 2026-10-29