A C-clamp is a work-holding tool. Its role is to hold the work temporarily in place; the clamp is removed after the job is finished.
Typical applications
- C-clamps hold work for carpentry, welding or cutting. Selection must match the particular work-holding requirements.
Advantages
- Clamps provide temporary work holding and are removed when the job is complete. They are not permanent fixtures.
Specifications to check
- Selection criteria for a generic c-clamp include opening, throat depth, clamping surfaces and rated clamping pressure. Opening and throat depth describe different aspects of reach.
Limitations
- C-clamps are designed for holding workpieces in place and should not be used for hoisting, pulling, or building worker platforms. These uses are outside their intended work-holding role.
Buying considerations
Match the clamp's reach and clamping surfaces to the job requirements. Use a deep‑throat clamp for deeper reach instead of an oversized clamp chosen solely for reach.
Safety & limits
- Avoid using a c-clamp that has a bent frame or spindle. Do not use improvised tools to tighten it; a wrench may only be used on a clamp designed for wrench tightening, and eye protection is required.
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: general tool safety and selection
Reference checked 2026-10-28