Scotch-Brite™ star pack 944S was designed for blending, deburring and finishing hard to reach internal diameters, including metal tubing and piping. Scotch-Brite™ star pack 944S contains stars of varying sizes and grades for a robust introductory set. Each star has six spindles attached to an eyelet. Made with non-woven technology, the spindles are spongy, buoyant and flexible. Consequently, they can bend and move to accommodate the insides of metal tubes and pipes. Scotch-Brite™ star comes in small sizes, with the smallest diameter being 1-1/2 in and the largest diameter being 4 in. The small size supplements the spongy spindles, helping the abrasive fit inside hard to reach areas. These stars lightly deburr and blend contours and ridges without gouging or marring the surface, helping to reduce scraps and rework. Stars may be used on a variety of metals such as stainless steel, aluminum, carbon steel, cast iron, titanium and non-ferrous metals. 3M™ mandrel 944 is included in the kit. The threaded attachments on the stars fasten to the mandrel for safe use on a die grinder. Scotch-Brite™ stars require low pressure when used at correct operating speeds. Stars in the introductory pack come in both coarse (CRS) and very fine (VFN) grades. Use a coarse abrasive when blending defects or refining previous scratches and use a very fine abrasive when a soft, fine scratch pattern is desired. Non-woven technology makes our Scotch-Brite™ industrial abrasives unique. A combination of fiber strands, resin and abrasive mineral forms a thick, open web. The spring like nature of the fibers responds to contours and effectively removes unwanted burrs, soils and contaminants while maintaining the geometry of the workpiece which in turn reduces rework and boosts productivity. Gaps in the web allow swarf to escape, so debris does not clog the mineral. Fibers in the web continually break down with use to reveal fresh mineral for exceptional consistency, superior cut performance and extremely long service life. Scotch-Brite™ products not only enhance productivity, but also increase operator safety by reducing the need for cleaning chemicals and pastes and replacing wire brushes that can break off and cause injury. From aesthetic finishing to deburring and more, Scotch-Brite™ abrasives work fast and deliver consistent results, part after part. Scotch-Brite™ star pack 944S is a great introductory kit for operators who need to blend, deburr and finish a variety of metal parts. The versatile range of sizes and grades included in the pack provide an economical means for finding the right star for your specific part. Scotch-Brite™ 7100031694, 1-1/2 in, 2 in, 3 in, 4 in Star Diameter, Coarse/Very Fine Grade, Non-Woven Backing, Applicable Materials: Aluminum, Carbon Steel, Cast Iron, Stainless Steel, Titanium and Non-Ferrous Metals, Eyelet Attachment