These Knipex 200mm Cobolt Bolt Cutters With Sprung Handles are professional quality. They are manufactured from chrome vanadium electric steel, oil hardened and tempered. These cutters will easily cut piano wire, soft solid wire, bolts, nails, rivets and screws. Little hand force is required to cut piano wire thanks to the lever action of the pliers. The Heavy duty plastic coated handles ensure maximum comfort, and they are fitted with return spring and locking mechanism.