Hss Parallel Shank Drill Bit (High Coblat) M42,As Per Is:5101:1991, Size 3.7 Mm(D) Optmum Drill Bit Tip Type A/D Optimum Flute Angle Type-N Use Drilling Operation On Stainless Steel. Specn: As Per Desc/10221749/105856609 (EXPIRED)