Additional layers extend life and use. Thicker discs provide strength, durability, and reduced heat buildup. Higher RPM speeds are suitable for faster machines. Sand hard, uncoated surfaces effectively without chipping or tearing like lower-quality discs. Both sides of the disc are coated to maximize longevity and usage. Embedded with durable grit for consistent performance without chipping, breaking, or spinning. Specification: Material: Electroplated silicon carbide Size: 100mm Thickness: 1.6mm Inner hole: 16mm Maximum speed: 14500 RPM Packing list: 1 x Cutting Disc Notes: 1. Due to variations in monitor brightness and lighting conditions, the actual color of the item may differ slightly from the image shown. 2. Please allow slight variation due to manual measurement.