DMT have developed an exclusive range of 5 different grades of diamond stone for use with the PSS (Model : A-USA-MPDMT-PSS1). From the extra course 120 grit stone (left) for fast removal of material to the Super Fine Finishing 1200 grit (right) for that supreme finish. No other hand held system uses such a wide variety of diamond grades for rapid removal of material to fine edge honing. DMT preparation stone @ 220 grit (Model : A-USA-MPDMT-PS)DMT finishing stone @ 450 grit (Model : A-USA-MPDMT-FS)DMT roughing stone @ 120 grit (Model : A-USA-MPDMT-ECS)DMT fine finishing stone @ 600 grit (Model : A -USA-MPDMT-FFS)DMT super fine finishing stone @ 1200 grit (Model : A-USA- MPDMT-SFFS)NOTE: Price is just for each stone.