DOUBLE BAR SEGMENTS - two diamond encrusted bar segments for longevity and higher productivity GRIT SIZE - #18/20 grit SOFT BOND - ideal for grinding medium to hard concrete SET OF 3 - set includes 3 pieces USE WET OR DRY - recommended to use with SASE Quick Change System floor grinding machines such as Sase PDG 5000/5000P/6000/8000/8000P/9500/R8/SHG 270 Trapezoidal diamond grinding tooling designed for SASE Quick Change System floor grinding machines. 2 diamond segments per disc, set includes 3 pieces total. Soft bond is ideal for grinding medium to hard concrete. #18/20 grit, use wet or dry with SASE floor grinding machines such as Sase PDG 5000/5000P/6000/8000/8000P/9500/R8/SHG 270.