Utoolmart High Speed Steel 4241 Straight Shank Twist Drill 100mm Length Heat Resistant Grinding Process Drill Diameter Longer Drill Bits Silver 10pcs - Product Features
- Product name: Straight high speed steel twist drill bits set
- Main Material:HSS-4241 high speed steel; Surface treatment: heat treatment
- bit diameter (mm): 6.7?handle diameter (mm)?6.7?total length (mm): 100, working edge length (mm): 63
- color: black, hardness (HRC): 62-63
- Package Content: 10 - twist drill bits; Rolling, nitriding,