Sutton Tools Heavy Duty Bi-Metal Cobalt 9 Piece Electrician’s Holesaw Set H125BM10Industrial quality holesaw designed for machine or hand drilling in steel, stainless steel, cast iron, non ferrous metals, plastic and wood All holesaws are packed in a newly developed space saving hang pack, featuring clear dimensional markings making selection easy Visually appealing form makes any retail shelves come to lifeFeatures: Made from Bi Metal Cobalt HSS for toughness and longer life Varied pitched cutting teeth reduces vibration for