ITEM NAME:6pcs Metric Thread M3-M10 Titanium Coated HSS Drill and Tap Bits 1/4" Hex Shank.Material: HSS. Shank:1/4 hex shank. 6 Pcs Titanium Drill Bits. Surface is coated with titanium or not for anti-oxidation and makes these cutters more durable. Self-centering point, do not need assistant center drilling or center punching.
