Usage: used for machining and polishing. main specifications: 6 inches, 8 inches, 10, 12 ... mainly used for grinding,sharpening,derssing and filing hard materials,such as knife blade, rubber and other composite materials5.Jiangyin Jiufeng diamond ... as diamond grinding wheel, diamond saw blade, diamond files and diamond core drill bits and diamond whetstone,diamondmounted point.ANY INTEREST PLS FEEL ...