HSS drill bits are ideal in relatively hard metals and wood, while cobalt is suitable for hardened metals, cast iron, and chrome steel. HSS drill bits are more elastic and, as such, don’t break easily, while cobalt drill bits are more brittle and chip quickly.
HSS & Cobalt Drill bits
Drill Point Drills – Straight Shank
0.50mm To 60mm
High Speed Steel
Hss Straigh Drill , Stub Drill