The knipex 74 91 series high leverage centre cutters with dipped pvc handles and centric precision cutting edges with an integrated forged joint axle for heavy duty use high cutting performance with minimum effort due to optimum co ordination of the cutting edge angle transmission ratio and ergonomic handle shape like most of the knipex range these cutters are oil hardened and tempered for longer life with cutting edges separately induction hardened to approx 64hrc they are made from top quality