This 6-piece bit taper combo set is ideal for soft metal processing, including drilling, burring, and descending. Set includes M3, M4, M5, M6, M8, M10 specifications, which meet the needs of different sizes of threading. Made of high-speed steel (HSS) material and titanium plating treatment, effectively improve hardness and abrasion resistance, and extend the service life. Hex shank design ensures a tight fit with the electric drill chuck, preventing slippage and more stable operation. Metric composite taper design combines drilling and tapping in one, greatly improving productivity and saving operation time. This tool can handle the processing tasks of aluminum alloy, copper, plastic and other soft metal materials with ease. The set is neatly organized, making it easy to carry and store and is an indispensable practical accessory in the toolbox