DIAMOND SHAPE - The diamond shaped surface of these 225mm discs is a revolution. It increases the speed at which waste is worn away during sanding, significantly extending the life of the 10-hole sanding pad. The design also provides excellent anti-clogging and heat dissipation properties, making it ideal for long sanding sessions. Torus 225mm J-Weight Heavy Duty Circular Sandpaper - The quality of the backing is key for the Torus 225mm Circular Sandpaper. Our 225mm annular sanding discs use a thick cloth backing that is three times more tear-resistant than other brands that use C-paper. This ensures that the wheel is securely attached to the sander without the risk of breaking or loosening. HIGH-DENSITY ADHESIVE BACKING - Our extended grinding wheels also feature a high-density flocked backing that weighs 135g/㎡, while other brands typically use 95g/㎡. This ensures that the wheels are more securely attached to your sander, so you don't have to worry about them flying off during use.