STKUSA 2 Inch Roloc Sanding Cleaning Discs Coar Grit Roll Lock Sanding Disc 25pcs 2 inch 25PCS Coar Grit Roll Lock Sanding Discs Open nylon web structure leading to better elasticity and plasticity, suitable for different shapes of various objects Safety torque spiral design with strong flexibility and long service life Wide application to stainless steel, standard or alloyed steel, non-ferrous materials and alloys, plastic and fiberglass