The product is a lot of 10 1-3/16" x 3/8" 180 grit flap wheels with a 1/8" shank designed for high speed use at 25,000 RPM. These medium grade wheels are constructed with aluminum oxide and resin-bonded abrasive material, making them durable and effective for a variety of metalworking applications. The wheels are mounted on a 1/8" shank and feature a durable construction suitable for industrial use in CNC and metalworking processes. With a trusted brand like ARC ABRASIVE, you can rely on the quality and performance of these flap wheels for your metalworking needs.