Professional quality tested to 10 000v and insulated to 1000v ac and 1500v dc for live line working manufactured from chrome vanadium electric steel oil hardened and tempered smoothly ground heads with cutting edges separately induction hardened to 64hrc for cutting piano hard and soft wires the cutter has no conventional centre rivet but a forged on pivot which can withstand extra leverage heavy insulated handles with slip guards for extra comfort and safety