Features: Crafted from premium alloy, these hexagonal grinding burrs deliver 30% enhancing hardness for efficient materials removal on metal/wood surfaces, ideal for precise tasks with pneumatic tool. Multiple grit option (coarse to fine) combined with a standard hexagonal shank ensuring seamlessly compatibility with most air power tool, enabling quick installation and various grinding applications. For professional mechanics, woodworking, and DIY enthusiasts requiring durability abrasive accessories for workshop projects or detailed craft refinishing. Optimized for industrial metalworking, automotive part restoration, furniture sanding, and hobbyist model making, delivering consistent performances across steel, aluminum, and hardwood substrates. Heat treated construction extends life by 50% conventional grinding bit, reducing downtimes in demanding environment like foundries or cabinetry shops while maintaining sharpened cutting edges. Specifications: Component: Diamantine, alloy Size: 2x2x7cm Properties: 20mm cylindrical Applicable scenario: suitable for polishing and polishing of metal, wood, molds, machinery, bearing Package Includes: Pack of 10 Hexagonal Shank Grinding Heads note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you donot mind befores you order. 2.Due to the differences between different monitors, the picture may not reflect the actual color. Thanks for your understandings.