Greywolf Cobalt Drill Bit Set, M35 HSS Metal Drill Bit Set, 135° for Hardened Metal, Stainless Steel, Cast Iron, Wood and Plastic, with Indexed Storage Box (Ø1-10mm) 10 pcs
【High-quality 5% cobalt steel, hardness 63 HRC】This fully ground cobalt drill bit set is made of 5% pure cobalt. The service life, heat resistance, wear res...