General description The 10pcs 4.5 inch 60 grit grinding discs are crafted from high-quality aluminum oxide resin fiber and feature a durable glass fiber backing plate. These discs are designed for grinding metal and wood, providing high density and wear resistance for various applications. Technical specifications Quantity: 10 discs Grit: 40# Outer diameter: 4.5 inches Mandrel diameter: 0.87 inches Maximum RPM: 18000 Compatibility and accessories Compatible with most air and electric grinders Suitable for angle grinders Usage Designed for grinding, deburring, cleaning, chamfering, sanding, and finishing various surfaces Effective for removing rust and paint Excellent for welding applications Other information Wear safety glasses and gloves before use Be cautious of sparks and avoid directing them at flammable objects or people No need to apply excessive pressure for effective results