Terms of the Trade: What Is a C-Clamp?

Clamps are hand tools that have one basic purpose: to apply pressure in a specific spot. C-clamps are one of the oldest clamp designs and are so named for their shape. The threaded portion allows for adjustments, but this variety tends to be on the smaller side, spanning from 1 to 8 inches. Use a clamp when your hands don't offer enough holding power, such as when repairing a door, woodworking or sharpening a lawn mower blade, or when you need to keep an assembly together as adhesive cures.