Description:This grinding disc uses diamond as abrasion and combined with composite material. Sharp, wear-resistant and high efficiency.Features:1, Using special binding agent.2, Strong grinding force and smoothness.3, Polish quickly and use for long time.4, No color left on stone after polishing.5, Mainly used for stone, glass, ceramics, crystal, ceramic stone, concrete,etc.Specifications:Diameter: 125mm / 4.92"Thickness: 3mm / 0.11"Inner Diameter: 20mm / 0.78"Granularity: 50/150/300/500/1000/2000/3000(Optional)Materiel: Diamond + resinSuitable for large model 150, model 180 grinding machine or edge grinding machine.50 Grit - coarse polishing150 Grit - coarse polishing300 Grit - coarse polishing500 Grit - medium polishing1000 Grit - medium polishing2000 Grit - medium polishing3000 Grit - buffingPackage Includes:1 x Grinding Disc(Backing pad/disc is not included)Note:Please add water when you operate..