With a hex shaft (0.25 inch (6.35 mm) finish, it can be attached to an impact driver with one touch, and can be easily used as a stainless steel drill. ● Short groove length for high rigidity, high efficiency and high precision drilling The use of cobalt high speed drill (drill blade NACHI) has improved abrasion resistance. The X-shaped thinning process provides good adhesion and the tip of the shavings can be discharged easily, thus extending the life of the drill. It also does not require a center punch. The tip angle (135°) is suitable for drilling stainless steel. The hexagonal shaft and drill are completely glued, but the pin is included to prevent it from rolling and falling out, so you can use it with confidence.