Features: High quality and diamond segment grinding wheel cup with high speed grinding and long service life. With air holes designed to aid in and maintain a cool stable cutting pattern and reduced wear. Designed to provide 30% faster stock removal with double row large grinding segments. Processed with high quality synthetic diamond coating that provides for a more consistent diamond scratch pattern. Great choice for people who do and marble worktops, headstones, tilers, builders. Provide very fast grinding action on masonry, stone and concrete. Specifications: : Tiling Type: Grinding Wheel Color: gold Material: Alloy Diameter of Hole: 22mm / 0.87inch Cup Shape: Dome Flange Diameter of Grinding Wheel: 150mm (5.91inch) / 180mm (7.09inch) Thickness of Grinding Wheel Disc Body: 2mm / 0.08 inch Thickness of Gear: 5mm / 0.20 inch Width of Gear: 27mm / 1.06 inch , 33mm / 1.30 inch Max. RPM: 13600 Used for: High-speed Electric Grinder & Pneumatic Tools, DIY Grinding & Polishing Wood, Metal & Mold Package Contents: 2 x diamond double row grinding wheel Only the above package content, other products are not included. Note: Light 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.