The NEW Drill Doctor 350X is even easier to use. It's the best way to sharpen your bits - and keep your projects looking sharp. Drill Doctor makes dull drill bits like new. Just 3 steps to a sharp bit - chuck the bit, align the bit, and sharpen the bit. A FREE DVD teaches you to be a sharpening expert in minutes. It sharpens most popular drill bit types and sizes, 3/32 in. to 1/2 in. It sharpens carbide, cobalt, high-speed steel, black oxide, TiN-coated and masonry bits. Work Smart, Work Sharp with Drill Doctor. Drill Doctor a better way to work.