Carbide-Coated Rasp Design: Copper-colored tungsten carbide surface delivers aggressive rubber removal for fast and efficient inner liner preparation. Built for Tire Repair: Ideal for prepping the inner liner before patch or plug installation, ensuring a clean, properly textured surface for maximum adhesion. 60 Grit Cutting Performance: Medium-coarse grit removes damaged rubber and contaminants while maintaining control and precision during buffing. 2-1/2.