Diamond Discs These high quality diamond discs feature laser cut steel tensioned plates with durable diamond concentration resulting in better performance and a better finish. These diamond cutting discs are designed to be used wet or dry and can be used to cut concrete, masonry, stone, asphalt, marble, granite and most general building materials. Features - Size: 230 x 10 x 22.23mm Bore - High Quality Diamond Concentration - Suitable for all 230mm grinders - 20mm reduction ring included - Maximum RPM 6,500 Compatibility Will fit any machine that can use a 230mm blade with a 22.23mm or 20mm bore. Package Contents: .