SUNMIGHT 2″ QUICK CHANGE SANDING DISCS – Sunmight Quick Change Discs are great for heavy-duty sanding. Sunmight Ceramic Quick Change Disc is a premium product that offers faster cut-rate and superior durability, and it will let you do more work in less time. Can be used with 3M’s Roloc 2″ Pad PN# 05539. Disc is 2″ in diameter. Product is sold by the box of 25 discs.