The Scotch-Brite™ marine cleaning disc was designed for a unique purpose and its name relays its intent: to help operators clean up ship propellers when there's more than just scum to remove. Keep propellers clean the Scotch-Brite™ marine cleaning disc removes marine growth, tubeworms, barnacles, calcium and basal plate build up from ship propellers. This non-woven disc offers a fast, clean method to replace costly, strong chemicals and time-consuming scraping by hand. As operators know well, propellers are an integral part of boating operations, keeping these parts clean is important for optimal boat performance. Propellers contribute to both acceleration and fuel efficiency. When weighted down by growth and debris, they cannot run as smoothly and require more fuel to sustain the same speed. Cleaning propellers helps reduce overall friction and resistance, so they can move more smoothly through the water. Strong and responsive, the Scotch-Brite™ marine cleaning disc is engineered by combining silicon carbide mineral and non-woven nylon fibers with resin. The mineral is extra coarse (XCS), meaning it cuts especially sharp compared to finer grades. This mineral is tough enough to remove the growth that resides on propellers. Still, the non-woven nylon fibers are responsive enough to not gouge the propeller or severely alter its geometry and remove the underlying gelcoat. The disc is available in two densities, so operators can choose the right density for their propeller. Hook and loop attachment the disc has a hook and loop attachment for easy change out of discs. It speeds the process by eliminating the need to work with fickle attachment systems. The hook and loop backing is designed to be used with hook and loop holder pads (sold separately). The hook and loop attachment acts like a cushion, providing some extra shock absorption and buoyancy. When run under normal use, the likelihood of gouging or denting the workpiece is reduced. The many benefits of open web abrasives non-woven technology makes 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 breakdown with use to reveal fresh mineral for exceptional consistency, superior cut performance, and extremely long service life. From aesthetic finishing to weld blending, deburring, and more, Scotch-Brite™ abrasives work fast and deliver consistent results, part after part. Scotch-Brite™ 7000046171, 9 in Diameter Disc, Extra Coarse Grade, Silicon Carbide Abrasive