M2 Titanium Step Drill Bits 3 Pieces for Metal, Wood, Stainless Steel, Plastic （4—12/20/32mm)

The durable step drill is made of HSS M2（6542） and the surface is treated with a titanium alloy, which greatly improves the cutting performance of the drill bit, is more wear-resistant, and extends the service life.Dimensions include: 4/6/8/10/12 mm、4/6/8/10/12/14/16/18/20 mm、4/6/8/10/12/14/16/18/20/22/24/26/28/30/32mm.Iron,stainless steel, hardened metal, mild steel, galvanized steel, aluminum, copper, plastic, wood，resin etc。The drill step bit suitable for pistol drill or bench drill, cooling water to extend its service life.