M/R Flat Pie Floor Abrasives utilize both metal-bonded abrasives in the lower grits (60 - 400 grit) for increased aggressiveness and resin-bonded abrasives in the middle to upper grits (600 - 3,500 grit) for better polishing. Like the Pyramid Pie Floor Abrasives, all M/R Flat Pie Floor Abrasives come in our unique pie shape designed especially for floor machines. M/R Flat Pie Floor Abrasives are for work on flat floor or slabs without bad lippage. M/R Flat Pie Floor Abrasives are available in 8 different grits (6 grit - 3,500 grit) providing the stone technician with a wide range of finishes.