SODIAL 4-22MM HSS 4241 Hex Titanium Cone Drill Bit Hole Cutter For Sheet Metal Hex Titanium Step Cone Drill Bit Hole Cutter 4-22MM HSS Size: 4-22 mm6,8,10,12,14,16,18,20, 22mm Shank:6mm(dia),25mm(L) Total:75mm(L) Material:High speed steel