Specifications : Brand: Total Tools Model: TAKC0651 Product: 5pcs Rotary File Shank Diameter: 6mm Tool Head Diameter: 8mm Material: YG7 Carbide tool head, 40CR tool rod Function: Carbide burs are used for shaping, grinding, and for the removal of sharp edges, burrs, and excess material (deburring). Compatibility: Used on pneumatic or electric die grinders Packaging: Plastic box packaging