This product is well-designed to provide you with a cost-effective set of high-performance and long-lasting sanding belts. The Klingspor's Superflex belts are superior for preparing stainless steel and bronze props for polishing. This high-performance grit keeps them cutting longer than most abrasive minerals. This product has a flexible J-weight backing that helps to avoid gouging and chatter. Key Features: These are very flexible belts and will roll easily over the edge of your contact platen or wheel to finish a plunge cut. These products are excellent for finishing and shaping handles or bolsters. These AO belts have a very flexible cloth backing It also has a dry lubricant added to the cutting medium to cut smoother. These are high-quality, durable, and excellent belts.