The EZ SpeedClic Sanding Discs are great for light sanding and shaping. The discs are available in 60 and 240 grit with a diameter of 30mm and are compatible with the SC402 mandrel. Change discs without using a wrench! The EZ SpeedClic sanding discs last 2x longer and remove 2x more material than the Dremel 411 and 413 sanding discs. Quick, Easy, Keyless.