Dremel 664DR Diamond Drill FlipBit, Burgundy Material Diamond Brand Dremel Item Dimensions LxWxH 0.67 x 1.94 x 4 inches Tool Flute Type Spiral Surface Recommendation Stone New FlipBit design - Use one bit to make 1.6mm and 2.1mm holes Perform three functions - drill holes, enlarge holes, make small cuts Drill hard materials - glass, tile, stone, ceramics, and more 5X longer life than existing Dremel solutions