High Speed Step Dril Bit 4-22MM HSS 4241 Hex Titanium Step Cone Drill Bit Cutter
The use of tools: drill, bench drill. - Do not need to use center punch, compared with the ordinary twist drill is not easy to be broken. 1 x Hex Titanium Step Drill. Shank: 6mm(dia), 25mm(L). Type: Center Drill Bit.