Introducing the 4.5 Inch Sanding Sleeves by POWERTEC.These spindle sander sleeves were designed to give your surfaces the perfect finish they deserve. Commonly used for sanding polishing curves, material removal and resurfacing, these sander accessories work effectively on a wide variety of non-ferrous metal based and woodworking projects. Constructed out of aluminum oxide, these high performance abrasive sleeves feature a superior quality grain that delivers precision and professional quality results. This cost effective combo includes three 120 grit sandpaper sanding sleeves.COMPATIBILITYFor use with most oscillating and spindle sanders.For best results and brand specific match, search Amazon for POWERTEC MODEL OS1400 OS1000POWERTEC is a US based manufacturer of high quality woodworking machines, wood work accessories, and a wide assortment of OEM replacement parts. We are committed to exceeding expectations, while bringing the best innovations, technologies, and product development to the industry.