1/8Inch shank is compatible with for Dremel, for Hardell, for Milwaukee angle or straight air or electric die grinder.and most other small rotary tools with three jaw chuck for accurate centering. An ideal choice for your DIY woodworking, carving, engraving, and polishing and it is easy to grasp and use, safe and reliable. Our rotary tool accessories are made with premium carbide tungsten steel, it has extremely high hardness and good toughness, machining hardness reach to HRC70. The differing profiles let wood carvers or metal engravers trim any shape with ease. With a double cut tooth angle, our rotary burrs are more aggressive. Double cut burrs providing better control and precision to ensure stable operation faster material removal, reduced loading, and a smoother surface finish. Our rotary burrs include everything you need for cutting, triming, shaping, grinding, polishing and removing on all most all edges, and it is compatible with ferrous and non-ferrous metals, wood, plastic glass jewelry stone leather and tile. The working life of these solid rotary burr is 10 times longer than high-speed steel and 200 times longer than grinding wheel. Colour:As Shown Material:Metal Package Contents: 1set * for dremel collet Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.