Harpow 10pcs Triangular sandpaper,power oscillating tool blades,multitool blades,power tool saw blades,fits Fein Bosch Craftsman Rockwell Einhell Westfalia Ferm Pro-Line Matrix tools Used with HP72 sanding backer; It fits in narrow space; It is suitable for universal use on almost all material such as wood, metal, fiberglass,plastic,paint,filler,welds,leather; Grit Number:60.