Pro'sKit PM-107F Electrician Precision Diagonal Pliers Side Cable Cutter Wire Nipper Hand Tools HRC 50 Cutting Made of SK5 steel, with knife-edge hardness up to HRC50, cut 1.6mm copper wire.Designed with plastic sleeve, comfortable grip and easy to slide.Handle with spring design, operation more effort.Designed for tight-fitting parts and comfortable hand-held angles, cut neat, smooth, and easy to operate.Especially suitable for the electronics industry, and production lines to cut copper wire use.