4Pcs Hss Step Drill Bit Set 501055

Spiral Groove, 4241 High Speed Steel
3-12Mm:3,4,5,6,7,8,9,10,11,12Mm
4-12Mm:4,6,8,10,12Mm
4-20Mm:4,6,8,10,12,14,16,18,20Mm
4-32Mm:4,6,8,10,12,14,16,18,20,
22,24,26,28,30,32Mm