The Draper Knipex is a professional quality product, tested to 10 kV and insulated to 1 kV AC and 1. 5 kV DC for live line working. Manufactured from vanadium electric steel, oil hardened and tempered. The Swedish pattern has smoothly ground heads and separately induction hardened cutting edges to 62 HRC. It will cut hard, medium-hard, and soft wires. Heavy insulated handles with slip guards for extra comfort and safety.