6Pcs M3-M10 Metric Thread Combination Drill and Tap Set, 6.35mm Hex Shank with Titanium Coating, Twist Drill Bit Set for Metal, Plastic, Wood 【Advanced Material】The 6pcs quick connect drill bit set is made of HSS 4341 material with titanium surface for precise cutting experience, durability, wear resistance and long service life. High Efficiency: Our quick connect drill bit 1/4 inch hex shank can drill, tap, deburr and countersink holes after completion, saving processing steps and time costs and improving work efficiency. Drill Smooth Holes: Hex drill bit sets feature a 1/4 inch hex shank for high concentricity and strength. Compatible with quick-change and standard chucks and metric drives. Percussion Steel coating with sharp anti-shake design for precise drilling and a clean finish. Wide Application: Titanium coated drill bits are suitable for drilling steel, hardened metals, wood and plastics, can be used with any standard drill bit such as power tools, electric drills, group