4-1/2 Inch 40 Grit Flap Disc This 40 grit flap disc is designed for tough sanding tasks on rough surfaces. It offers versatility for various sanding needs. Specifications: • Diameter: 4-1/2 inches • Arbor size: 7/8 inch • Grit: 40 • Maximum rotation speed: 13,300 rpm Key Features: • Durable Construction: Made with high-grade Zirconia Alumina for enhanced hardness and efficiency • Professional Quality: Utilizes high-temperature calcined corundum for improved wear resistance and longevity • Efficient Design: Built with heat-resistant substrates to increase sanding surface usage and overall efficiency • Extended Lifespan: Features extra thickness and a large abrasive surface for prolonged sharpness and durability • Versatile Applications: Compatible with most angle grinders and suitable for use on stainless steel, metal, and wood Ideal for grinding welds, deburring, rust removal, casting cleanup, and wood sanding. This flap disc offers a balance of performance and durability for various industrial and DIY applications.