The Spiral Drill Bits Set combination bits perform all three operations with one bit, providing you with the same accuracy and power in a simple, fast, and easy-to-use package. A quick change adapter is also included to help you to drill, tap, and countersink, and even drive fasteners even faster. For use with up to 10-gauge mild steel, the Spiral Drill Bits Set combination makes drilling, tapping, and countersinking holes faster and easier than ever before.
High Quality and Brand new.
Suitable for drilling, tapping, cutting on soft metal, aluminum plate, iron, etc.
Fast replacement composite cone, uses drill edged principle.
Drilling and tapping in one, one-step processing, greatly save processing steps and time costs, improve working efficiency.
Self-centering point, do not need assistant center drilling or center punching.