3M™ Stikit™ Paper Disc Roll 210U discs feature open coat aluminum oxide abrasive on a light A-weight paper backing suitable for lightweight sanding and finishing. Designed for convenience, the roll makes the discs easy to grab while eliminating the use of disc liners, and the handy adhesive backing provides quick and easy attachment. - 3M Stikit paper disc roll 210U discs feature open coat aluminum oxide abrasive on a light A-weight paper backing suitable for lightweight sanding and finishing. Designed for convenience, the roll makes the discs easy to grab while eliminating the use of disc liners and the handy adhesive backing provides quick and easy attachment.