LAWIOO glass cutting discs are made of alloy material, only 1 mm thick, mainly used for cutting and polishing glass, porcelain, crystal and ceramic tiles, with fast cutting speed and smooth cutting surface. 5 Pack Indestructible Disc for Grinder Material: Diamond + Alloy Hole Diameter: 20mm Thickness: 1mm Diameter: 100mm Package Weight: 0.3 pounds Grit: 120# Advanced diamond materials, new brazing process Suitable for smooth cutting and grinding of glass, jade, crystal, tiles LAWIOO Indestructible Disc for Grinder LAWIOO indestructible glass cutting disc with diamond high manganese steel substrate, new brazing process, 4 inches (100 mm) in diameter, 0.04 inches (1 mm) thick, compatible with all 4 inches (100 models) angle grindersLAIWOO 1 mm ultra-thin diamond cutting tool, fast cutting speed, smooth cutting surface, less chips, high temperature resistance, low noise, longer service life.LAWIOO grinder cutting disc are mainly used for smooth cutting, chamfering and grinding of glass, jade, crystal, wine bottles, ceramics, tiles and other materials. Advanced Comparison Cutting Iron Discs Cutting Iron Discs Cutting Metal & Glass Material Diamond Material Diamond Cutting Thin Metals & Glass HSS Scope of application Cutting High-Strength Metals Scope of application Cutting High-Strength Metals Scope of application Cutting Thin Metals & Glass & Plastic