3M™ Roloc™ attachment enables efficient and secure installation and removal of the disc Durable aluminum oxide abrasive grains cut fast and perform well on many surfaces Tough YF-weight, polyester backing supports medium-pressure applications and provides consistent performance Heat-resistant resin coating bonds abrasive to backing for durability under pressure, heat, and water Work in wet or dry applications High performance grinding, blending, deburring, and finishing on all metalsDiameter: 2″ (50.8 mm) Grit: 50 Maximum RPM: 25,000 Attachment type: TR (Plastic) Backing material: Polyester cloth Backing weight: XF Weight Bonding type: Resin Mineral type: Aluminum Oxide