5813 16 Grit Double Sided Carbide Disc by Raimondi 16 Grit Double Sided Carbide Disc. Coarse for quick floor grinding. Grinding cement, metal Removing over-spray, thinset Scarifying surfaces to improve the bonding of adhesives and remove sealers. . Posted in Concrete & Masonry Tools, Grinding Heads, Surface Preparation Tools tagged with Raimondi