... fast grinding 3. soft bond for hard material 4. coorespondent formulaes for exact stone Usage:1. For stones, such as granite, marble ... , natural and artificial stones, etc.2. For grinding, leveling, shaping and polishing stone surface, corners,edges and ... M14, M16 etc.grit: #36,#60,#80,#100,#120,#180,#200,#220 body: metal, eluminum; with or without holesDifferent turbo as below ...