depressed center abrasive wheel For polishing staintless steel, metal, iron, stone etc. flexible, durable, easy, safe Reinforced Fibre Resinbonded Grinding Wheels---Depressed Center Grinding WheelsResionoid bond fiber--- cut off wheelsDescription of the product: Material: Aluminium OxideAbrasive: Corundum ANet: Fireglass Net 1/2Max. Speed: 72m/s 80m/sUsage: Polish and Cut metal, stone, parcelain ...