DEWALT DWA1181 21피스 세트 블랙 산화물 코팅 Hss 트위스트 드릴 비트 세트

["DEWALT 21-pack black oxide twist drill bit set is ideal for general-purpose drilling materials like metal, hardwood, softwood, PVC and fiberglass","Parabolic flute design increases chip ejection in metal and wood drilling applications","Black oxide coating helps resist corrosion and increase durability, so your drill bits last longer","135° Split-point tips drill on contact and prevents walking on the hard surface you’re working on","31° Helix reduces over aggressiveness of true parabolic flute, making it ideal for drilling deep holes"]