grinding tools use for hand-operated machine or floor repolishing machine grit 50,200,400 size 4" 6" 8" 10" grinding tools pressed granulated resin diamonduse for hand-operated machine or floor repolishing machine grit 50,200,400size 4" 6" 8" 10" package :4" 50pcs/ctn 6" 20pcs/ctn 8" 10pcs/ctn 10" 5pcs/ctnweitght 4" 20kg/ctn 6" 23kg/ctn 8" 25kg/ctn 10" 28kg/ctn grinding tools pressed granulated ...