Features: . Metric taper tap. Multi-purpose drill bit threading deburr countersink Allen tip set. Drill Bit Threading/Tapping, Deburring and Tapered Drill Bit. Drill/Faucet/Countersink Set, Metric, Pack of 6 Drill/tap. Hole drilling, tapping and deburring/countersinking. Back tapered off the tap to prevent thread damage from excessive drilling. Deburr/countersink also on the bit outside the taper return. Specifications:Material: High Speed Steel Upper: 1/4 in Quick Change HexMetric 6PC:M3 M4 M5 M8 M6 M10 Suitable for soft metal writing, such as aluminum plate, 3-4mm thick. The advantage is opening, tapping, chamfering. Package Includes: 6pcs Drill BitNote: Please allow 1-3mm error due to manual measurement. Due to the difference between different monitors, the picture may not reflect the actual color of the item.