●This set comes with 45 quick change sanding discs, accompanied by a 1/4 shank holder for convenient attachment and detachment, enhancing the efficiency of your sanding projects. ●Bates quick change sanding discs are made of aluminum oxide, known for its durability, longevity, and excellent abrasive properties, guaranteeing effective and smooth sanding results. ●This set offers 3 types of grits 60, 80, 240 to meet varied sanding needs: 15 coarse black discs for heavy material removal, 15 medium red discs for general sanding, and 15 fine blue discs for achieving smooth finishes. ●To facilitate easy and quick identification, each grit level is uniquely color-coded. This feature saves time by allowing for prompt selection of the desired grit during operations. ●The provided 1/4 shank holder ensures the discs can be seamlessly paired with a multitude of tools. This makes the set an indispensable resource for professionals and DIY enthusiasts alike.