3M 3 inch Back Up Disc Pads
20427 – Hookit™ Clean Sanding Disc Pad Kit, 3 inch x 1/2 inch
Dust extraction Hookit™ back up pad (Clean Sanding) is constructed on foam material. The backup pad itself has a 5/16-24 internal thread, and the kit includes five adaptors that convert it to 1/4-20 external threads, 1/4-20 internal threads, 1/4-28 external threads, 5/16-24 external threads, or 6mm-1.0 external threads.
5771 – Hookit™ Soft Interface Pad
Used with standard Hookit™ Back-Up Pad, increases conformability, allowing the technician to follow contours and get in closer to most edges. Constructed of a soft durable foam, with 6 dust holes. Used with clean sanding, and non-dust free discs.