Power Tool Consumables -6pcs Hss Metric Drill Bit Combination Drill Metric Drill Set + Golden Short Tap Highlights Generic Brand 6pcs Hss Metric Drill Bit Combination Drill Metric Drill + Golden Short Tap Description: - High Speed Steel - Made of high grade 4341 HSS for durability; - Suitable for drilling and tapping aluminum, brass, copper, plastic, wood, steel, etc. --Three functions in one bit - Drilling, tapping and countersinking in one pass to save your valuable labor and time; Point is self-centering and eliminates the need for center drilling or center punching --Hex Shank - 1/6" (6.35mm) quick-change hex shank with SAE sizes etched on tapping bits for recognition easy. - Spiral Flute - Wide flutes sweep chips out of the hole. These tapping and combination drill bits can be used on multi-spindle heads with reversing mechanisms for tapping in most materials. specification: Material: HSS 4341 Shank: 1/4 inch (6.35mm) hex shank Color: gold, silver (optional) Size: M3x0.5mm, M4x0.7mm, M5x0.8mm, M6x1mm, M8x1.25mm, M10x1.5mm The Package includes: 6 x Compound Tap Drill Bits Note: The combination drill bits and taps are highly recommended to be used on a tapping machine. If you are using an electric hand drill to do the tapping, please be careful with your use, as excessive shaking and tilting can affect the result and even break the bit.