The Dremel 7150 Diamond Point Set is a set of two diamond point rotary accessory bits, (1) 7103 and (1) 7144, used for fine detail work such as cutting, engraving, carving, touch-up and finishing work. These diamond bits are perfect for engraving in glass and other fine materials. The 1/8 inch shank will work with any one of our rotary tools. Great for wood, jade, ceramic, glass, hardened steel, and semi-precious stones rotary accessory.