This Stone Grader has shipping damage, but it is brand otherwise and perfectly functional. Save $10!
The TORMEK Stone Grader is used to grade the Grindstone to a finer surface. The TORMEK Grindstone and the Tormek Blackstone Silicon both have a normal grit rating of 220 with a grain size is 0.06 mm (0.0024"). Use the Stone grader to change to a 1000 grit suitable for fine finish grinding/sharpening
Use the other side of the grader to return the stone to its 220 grit.
The stone grader is also used for renewing the Tormek Japanese Water Stone.