General description The FLITI Flap Discs come in a convenient 10 pack, featuring 4.5 inch diameter sanding discs made from high-density aluminum oxide. These versatile grinding wheels are designed for sanding metal and wood, making them ideal for various applications including grinding, deburring, cleaning, chamfering, and finishing surfaces. Technical specifications Quantity: 10 discs Grit: 40# Outer diameter: 4.5 inches Mandrel diameter: 0.87 inches Material: High quality aluminum oxide resin fiber with fiberglass backing Compatibility and accessories Compatible with most air and electric grinders Works with angle grinders up to 18000 RPM Usage Suitable for removing rust and paint Excellent for welding performance Designed for both professional and amateur users Other information Safety tips: Wear safety glasses and gloves before starting work Be cautious of sparks and avoid directing them at flammable objects or people No need to apply excessive pressure; the discs will perform