Power Sanding Mandrels/Interface Pads
Two types of holders available
Tim Skilton (Austrailian) Power Sanding Pads. 1/4" Hex shaft, with Velcro Face. This is the best available!

New Economy pads, slightly undersized, yellow foam, round shaft,micro hook

Protect your Hook and Loop with a disk holder protective pad or adjust the firmness with interface pads
Thick, soft pads are great for warped wood sanding at lower speeds and light pressure