SUNMIGHT 3″ QUICK CHANGE SANDING DISCS – The Sunmight Quick Change Disc is 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 3″ Pad PN’s# 45090 or 45091. Disc is 3″ in diameter. Product is sold by the box of 25 discs.