These cutters cut everything from soft material less than 1 mil to 14 AWG copper wire. Cutting edges are a durable 58-60 Rockwell C. The pivot point is an adjustable, high precision screw and post, ensuring optimal shearing action over the life of the tool. Handles have non-slip rubber grips, and a lifetime-warranted return spring. Two series to choose from. 9100 Series has an oval-shaped head. 9200 Series has a tapered head. Both are 5" long, and are available with optional lead retainer or static-dissipative grips.