Crimping pliers

Crimping pliers are a specialized tool with two different notches cut into their jaws, unlike ordinary pliers with one flat gripping surface. The first notch folds a crimp bead around the wire into a curved, C-shaped or crescent form, and the second notch rolls that shape into a neat, rounded cylinder.

The two-step process matters because it distributes pressure around the crimp bead rather than crushing it flat in one spot, which grips the wire strands more securely and leaves a smooth, rounded result that sits more comfortably against skin than a flattened crimp does.

When buying, match the plier size to the crimp beads used: macro crimping pliers suit larger crimp tubes and covers, while micro versions handle small crimps used with fine beading wire. A common mistake is skipping the first notch and going straight to rounding, or using ordinary flat pliers instead, both of which weaken the crimp instead of strengthening it.