3mm Steel construction with safety grips. Crimps non-insulated terminals 10-14, 16-18 and 20-22 AWG wire. Crimps open barrel connectors 14-18 and 20-22 AWG wire. Crimps computer pins and sockets D-Sub 26-28 AWG wire. Crimps butt-insulated connectors 22-26 AWG wire. Crimps telephone piercing spade lugs 22-26 AWG wire. Hardened cutting edge for soft wire and cables.