3M™ Centre Pin Back-Up Pads are used in conjunction with Scotch-Brite™ Surface Conditioning discs. Our pads don’t interfere with work surfaces.Quickly and easily place centre Scotch-Brite™ Surface Conditioning discs with 3M™ Centre Pin Back-Up Pads. Our pads allow the discs to be used at the usual angle.They also don’t interfere with work surfaces and make centring the discs quicker.