Diagonal pliers

The plane defined by the cutting edges of the jaws intersects the joint rivet at an angle or "on a diagonal", giving pliers their name.

Lower quality versions are generally not suitable for cutting tempered steel, such as piano wire, as the jaws are not hard enough.

For electronics work, special diagonal cutters that are ground flush to the apex of the cutting edge on one side of the jaws are often used.

For easier cutting of larger gauge wire, a compound action can be employed to increase the mechanical advantage.

Some pliers for electrical work are fitted with wire-cutter blades either built into the jaws or on the handles just below the pivot.