Feature:100% brand new and high quality.Metric Taper Plug Tap tapping drill.multi-use drill tap deburr countersink hex bit kit.Drill/Tap Bit Tapping， Deburring And Countersink Bit.Drill/Tap/Countersink Set， Metric， 6 Pc.Drill/Tap Bit.hole drilling， tapping and deburring/countersinking.Back tapered beyond tap to prevent thread damage from over-drilling.Deburr/countersink also provided on bit beyond back taper.Specifications:Material : High Speed SteelShank : 1/4 IN Quick Change HexMetric 6PC:M3 M4 M5 M8 M6 M10Suitable for soft metal tapping， such as aluminum plate， 3-4mm thickness.The advantage is opening， tapping， chamfering.Package Included:6pcs Metric Drill/Tap/Countersink Bit Spiral Machine tap Screw Tap Drill.