The Knipex Twinforce High Leverage Diagonal Side Cutters are manufactured from chrome vanadium, heavy duty steel that is oil hardened & tempered. The smoothly ground heads have separately induction hardened cutting edges for cutting piano & medium hard wires. The cutter has Knipexs unique double hinged design allowing for 50% less effort when cutting compared with high leverage diagonal cutters. Heavy duty moulded handles & slip guards for extra comfort & safety are also featured.