Shank Dia: 6.2mm 1/4 Hex ShankMaterial: High speed steelFeatures:- Suitable for drilling， tapping， cutting on soft metal， aluminum plate， iron， etc.- Fast replacement composite cone， uses drill edged principle.- Drilling and tapping in one， one-step processing， greatly save processing steps and time costs， improve working efficiency.- Self-centering point， do not need assistant center drilling or center punching.- High hardness， rustproof， solid and durable.Package Included:6x Drill Tap Countersink