Waterproof Pin Hole Sanding DiscsThese are thin waterproof paper backed discs with silicone carbide glue bonded on one side. Specially for use in sanding and smoothing gold jewelry. Speed max. 30,000 rpm. Use with screw mandrels. 7/8" Diameter Medium GRITFOR PERFECT FINISH100 PIECES IN THE BOXWeight 6oz. 17 gmBrand: EC MOORECountry/Region of Manufacture: United States
