BeadSmith 30-Piece Diamond-Tip Drill Bits For Engraving - 150 Grit/3.17mm Shanks
This 30-piece diamond tip drill bit set is ideal for engraving wood, ceramics, metal, glass, plastic & more! These tips work well with micro engravers and rotary tools. Tips are 150 grit with 3.17mm shanks. Includes a variety of tip shapes and sizes.