Hex Shank Cobalt Metric Drill Bit Set 15 PCS (1.5mm-8mm), Quick Change 13PCS
Cobalt drill bit is more durable than titanium drill bit. 【Specification】13 cobalt hexagonal shank bits, including 1.5, 2.0, 2.5, 3.0, 3.2, 3.5, 4.0, 4.5, 4.8, 5.0, 5.5, 6.0, 6.5 mm, with 1/4 hexagonal shank.