3pcs HSS Steel Step Cone Drill Titanium Bit Set Hole Cutter. Cut for the use of holes in a variety of materials such as steel, brass, wood, plastic, etc.. Two-fluted design for fast, smooth cutting. Automatically deburrs holes as you drill.. Tri-Flatted shank fits into power tools chuck securely and eliminates slip. Titanium coated to reduce friction and heat..
