1/8Inch shank is compatible with for , for , for 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 stable operation faster material removal, reduced loading, and a smoother . 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. Material:Metal Package Contents: 1set * for collet