100/120 grit resin hybrid with a yellow case. This tool is a very good tool to transition to polishing resins. It can follow most 60 to 80 grit metal bonded tools and all 100 to 120 grit metal bonded tools. This will leave the floor with a nice honed finish. This tool is part of the next floor system. This specially formulated Mach 3P resin cuts like a metal with exceptional life (up to 7500 square feet.) The Mach 3 is a less aggressive tool than the 2, but it is still ideal for medium to hard concrete and follows the Mach 2.