â–²Features: â— The cutting edges strictly avoid partial hole, ensure the quality. â— Great for PC Boards, Plastics, Fiberglass, Wood, Soft Metals, etc. â— Large drill bit chip space, chip resistance,Chip smooth, small drilling heat, reduce smear. â— Cutting edge strictly symmetrical: beneficial and efficient cutting, avoid offset drilling. â— Drill has a large scraps discharge space, little resistance and smoothly during the scraps discharge. â— High hardness, high wear resistance, high strength, resistance to bending, anti-impairment and long tool life.