1. QUALITY MATERIALS: This poly strip grinding wheel is made of silicon carbide abrasive and unique nonwoven nylon fiber. When grinding at high speed, the purple bar grinding wheel produces less sparks and is less likely to burn the surface of the workpiece, thus avoiding damage to the workpiece. 2. SIZE INFORMATION: Diameter 4', Thickness 3/5', Bore 5/8', Maximum Speed 13,300 (R.P.M.); Grit Size Silicon Carbide 46. 3. HONEYCOMB STRUCTURE: When grinding, if metal debris adheres to the grinding wheel, it will affect the cutting force and reduce the grinding efficiency. The descaling grinding wheel produced by our company is of open mesh structure. When grinding, the debris passes through the fiber gap, it is not easy to be clogged, and has a long life. 4. SCOPE OF APPLICATION: This paint removing wheel can be used for removing rust, paint, sealant, cleaning around weld seams, removing oxides, etc..