Designed for versatility and performance, these flap discs from CGW Abrasives are ideal for a variety of applications, including ferrous and non-ferrous metals, plastics, and wood. The A3 Flap Discs feature a premium aluminum oxide grain mounted on a durable polyester backing, ensuring longevity and effective material removal. With a size of 4-1/2 x 5/8-11 and a grit rating of 60, these discs can operate at an impressive RPM of 13,300, making them suitable for both professional and DIY projects. Each box contains 10 discs, providing a reliable solution for your welding and gas essentials needs.