Drill Doctor DD750X-KP CRKT Drill Bit Sharpener with Knife Free Drifter Knife from Columbia River Knife and Tool. A $40 value, free with purchase of a DD750X Quickly align and sharpen drill bits Sharpens 3/32-Inch to 3/4-Inch standard twist bits and creates split points Sharpens high-speed steel, masonry, carbide, and Tin-coated bits 7-3/4 pounds; 3-year warranty valid only in North America on 110-Volt power sources