The Rubi Superpro Bullnose for Curved Edges is a grinder accessory that will easily cut countertops, steps, swimming pool copings, tree surrounds, kerbs, among many other tasks, both in porcelain stoneware, natural stone and other landscaping materials with thicknesses of up to 20mm. RUBIs diamond grinding wheels are designed for dry cutting and can be adapted to any grinder on the market thanks to their M14 thread connection. Thanks to vacuum brazing technology, the high-quality diamond particles adhere to the body of the tool and are highly resistant to friction and temperature. For the correct use of diamond grinding wheels, you should never exceed a speed of 14,000 rpm. However, if you also wish to obtain the best performance and quality in the finish, Rubi recommend the use of grinders with speeds between 6,000 and 8,000 rpm.