Features: The grinding head is perfect for grinding marble, and quartz countertops. These tips ensures that the diamond particles are firmly fixed and not easily detached. The high manganese steel is integrated and has good anti pressure, and anti impact properties. It does not deform or break during use. This product is suitable for workers who need to grinding hard and brittle materials such as marble, quartz stone, and various artificial stones. It has M10 threaded interfaces that can be directly installed on angle grinder. Specifications: Material:Metal M10 threaded interfaces; Option Type:6mm Grinding Head,10mm Grinding Head,15mm Grinding Head; 6mm Grinding Head:Diameter: 6mm, working depth: 35mm, total length: 58mm; 10mm Grinding Head:Diameter: 10mm, working depth: 25mm, total length: 46mm; 15mm Grinding Head:Diameter: 15mm, working depth: 20mm, total length: 41mm; Package Includes: 1xGrinding Head note: Please allow 1-2cm errors due to manual measurement,please make sure that you do not mind before you order. Due to the difference between different monitors, the picture may not reflect the actual color of the item.