6pcs M3-M10 Hss Drill Tap Countersink Deburr Set Metric Combination Drill Tap Bit 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 Steel Shank : 1/4 IN Quick Change Hex Metric 6PC:M3 M4 M5 M8 M6 M10 Suitable for soft metal tapping, such as aluminum plate, 3-4mm thickness. The advantage is opening, tapping, chamfering. Package Includes: 1 Set (6pcs) Drill Bit