About This DOUBLE SEGMENTS - diamond encrusted bar segments allow longevity and higher productivity HARD BOND - suitable for medium-soft to soft concrete GRIT SIZE & SET - #18/20 grit size includes 3 grinding discs for ASL, Iron Horse, Warrior & XtremePolishing planetary grinders NON-THREADED HOLES - 3 x 8.5mm non screw holes designed for grinding machines with 3 non threaded holes for the RTS Iron Horse Grinders USE WET OR DRY - walkbehind grinder recommended Overview Grit Material : Diamond Product Dimensions : 0.33"L x 0.33"W Brand : EDiamondTools Compatible Devices : RTS /750-T9/650-T8/600-T1/550-T7/500-T2/T3/460-T6 Iron Horse Planetary Grinders, Warrior Grinders, XtremePolishing Systems - Genie and Mammoth RTS /750-T9/650-T8/600-T1/550-T7/500-T2/T3/460-T6 Iron Horse Planetary Grinders, Warrior Grinders, XtremePolishing Systems - Genie and Mammoth Grit Type : #18/20 Grit