uxcell Cylinder 6 x 12mm Diamond Point Polishing Grinding Bit Burr Product Name: Diamond Grinding Bit Material: Metal, Diamond; Head Diameter: 12mm/ 0.47"; Head Length: 20mm/0.78" Shank Diameter: 6mm/ 0.24"; Total Length: 70mm/ 2.75" Color: Silver Tone; Weight: 28g Package Content: 1 x Diamond Grinding Bit