Diamond Cup Grinding Wheel for Concrete Granite Marble Masonry Stone Hole design Multi-hole design helps maintain and cool the cutting pattern and reduces wear 12 segments Rust-resistant and wear-resistant, not easy to deform, and remove material blocksHeat treated steel body and high concentration diamond, higher durability and longer service life Safety Tips For safety, we suggest you wear safety equipment such as goggles, gloves, dust mask or earmuffs to protect yourself when using these diamond cup grinding wheels. Concrete Turbo Diamond Grinding Cup Wheel Material Material: heat-treated steel body and high concentration of diamond Diamond Cup Wheel Specification Outer diameter: 100 mm/4 inches Inner hole diameter of diamond grinding wheel: 20mm/ 0.79 inches (without metal ring) Diamond Cup Wheel Specification Thickness of Grinding Wheel Disc Body: 19.7mm/ 0.78 inches Thickness: 5mm/ 0.2 inches Diamond cup wheel, high level grinding and coating removal 4 Inch Concrete Turbo Diamond Grinding Cup Wheel Widely used in polishing the surface of marble, concrete and other Package includes: 6* 4 Inch Concrete Grinding Wheel