3Pcs HSS CO Removable Non-Slip Spot Weld Coating Titanium Air Cutter Drill Bit
Material: HSS CO Cobalt Material. 【Polka dot】. 【Clothing, Shoes & Accessorie】. - High speed Cobalt bit, Titanium coating prevents bit dulling from overheating. - High strength and hardness. 【Water Shutter】.