Simply buy 3M™ Clean Sanding Disc Pad Hook Saver | Hoffmann Group
Mirka Disc Pad Savers | Axminster Tools
Pad Saver for Random Orbital Sanders - Bosch Professional
Mirka 8295610111 Backing Pad Hook'N'Loop HookIt Saver 150mm 6" 67H Vacuum Sanding Pads Saver This pad saver for backing pads has a 3 mm protective interface : Amazon.co.uk: DIY & Tools