DOUBLE SEGMENTS - diamond encrusted button segments HARD BOND - suitable for medium-soft to soft concrete GRIT SIZE - #120/150 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. Hard bond is suitable for grinding soft 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 #120/150 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.