DOUBLE SEGMENTS - diamond encrusted button segments MEDIUM BOND - suitable for medium soft to medium concrete GRIT SIZE - #18/20 grit size SET OF 3 - includes 3 grinding discs COMPATIBLE - fits Lavina, Onfloor, EDCO Magnatrap grinding machines Trapezoidal diamond grinding tooling designed for Lavina, Edco Magnatrap and Onfloor grinding machines. Medium bond is suitable for grinding medium-soft to medium concrete. Number of grinding segments determines the pressure applied on each diamond segment, thus the aggressiveness of grinding. A lower number of segments corresponds to a more aggressive grind. Comes in a set of 3 pieces with #18/20 grit. Use wet or dry with Lavina L7/ L13/ L20/ L21/ L25/ L30/ L32/ L38 grinding machines and X-Series of equivalent models, EDCO Magnatrap grinding machines or Onfloor grinding machines.