Thread Tap Drill Bits SetSAVE TIME, MONEY & ENERGY! Whether you're a hobbyist, a mechanic, or a machinist who constantly works with fasteners, you can create threaded holes with ease when you have this Thread Tap Drill Bits Set! This set is designed for the most demanding projects and the hardest materials. The bits can drill, tap, and countersink holes in just one step because they are able to quickly penetrate materials. They come in a wide range of sizes and have a self