3M Roloc quick change discs are smaller discs that easily and quickly attach onto a Roloc disc pad (sold separately) so that you can conveniently change discs from job to job or in multi-step finishing processes. The Roloc Quick Change Attachment System provides a secure attachment even for heavy-duty applications, and the variety of available Roloc discs allows swapping from one application to the next in seconds. Each disc is also color-coded to identify its grade, making it easy to grab the grade required for different applications.