(1) Durable metal and diamond compound (2) Effective in the process of grinding and polishing concrete floor (3) Different colors and Sizes as requested. (4) Competitive price and superior quality.Diamond floor grinding shoes are designed specifically for Concrete floor restoration professional, for quick removal of any materials, bonds Hard, Medium, or Soft available for kinds of concrete.                 The hard segment is ideal for removing heavy coating. The bar segment is extremely aggressive leaving and deep to medium scratch pattern. The double segments remove adhesives, coating and lippage, taking the floor from coarsely structured surface to pre-polishing.HTC Diamond grinding tools designed for HTC Greyline/Professional floor grinding machines, which specifically developed for removal of thinner coatings and for concrete surface levelling. Concrete grinding is the process of removing existing concrete to remove imperfections from the original concrete installation or to drop the height of the concrete floor.