This stone finisher tool set is for preparing stone cutters that cut lay down or stand up brushes surface smoother than a metal blade cutter. The set is supplied with the blue anodised brush setter and stone block. New stone cutters(MK-SBB Stone Brush Cutter) can be cut to the users desired diameter with the stone block and when finished is turned upside down and mounted to the motor shaft as normal. The supplied brush setter cuts the brushes to 0.0mm or zero timing.