3Pcs HSS Steel Titanium Drill Bit 4-12/20/32mm Metal Hole Cutter Drilling Tool
Made from high quality HSS steel. 4 - 12mm, 4 - 20mm, 4 - 32mm. With the Titanium coated to reduce friction and heat. Automatically deburrs holes as you drill. Caution: When you use this drill bits, the material (eg. ).