This diamond burr set is designed to be used with high speed rotary tools, grinders and drills. If you're a DIY enthusiast or hobbyist or craft fan, it may give your rotary tool even more functionality with this set of diamond burrs. Description: Coated with tough diamond particle at head Great for carving, etching, grinding, sanding, etc Ideal for glass, metal, stone, tile, ceramics and more Perfect for jewelers, craft hobbyists, modelers, and other professions Note: It should be cooling with water when use it, keep motionless to install it, and cannot too forcibly to use it Total length: Approx. 45mm / 1.77 inch Shankdiameter: Approx. 3mm / 0.12 inch Frosted ball diameter: Approx. 6mm/ 0.24 inch Grit: 150# Needle tip shape: Ball shape Material: Diamond Color: Silvery tone Package Includes: 4 x Diamond Ball Shape Burrs
