3PCS 4-32mm HSS Spiral Step Drill Nitride Cone Drill Bit Metal Hole Cutter Tool

Features HSS material and long service life Widely used Suitable for use in the work of various materials steel plates aluminium copper stainless steel plastic boxes and chassis Specification Size 1 About 10 1 1cm 3 9 0 3 2 About 7 5 0 8cm 2 9 0 3 3 About 6 4 0 6cm 2 5 0 2 Used ForIsteel Brass wood plastic etc Package Includes 3xStep Drill Bits