This 1/2 in. × 18 in. Norton BlueFire file belt features a 60-grit, coarse zirconia alumina abrasive for fast, aggressive cutting and light-to-moderate stock removal on metal and wood. Its self-sharpening abrasive is designed to last up to 30% longer than competitive zirconia belts, while the durable resin bond helps retain grain. The moderately flexible, waterproof X-weight polyester backing supports light- to moderate-pressure use in wet or dry applications, including grinding, honing, fabrication, and foundry snagging. It is suited to materials such as tool steels, stainless steel, cast iron, aluminum, copper, brass, and bronze.