3M 20427 3M™ Hookit™ Clean Sanding Disc Pad Kit, 20427, 3 in x 1/2 in x 5/16 in (7.62 cm x 1.27 cm x 0.79 cm), Colour: Yellow, 3M Stock No. 7000045008

3M™ Hookit™ Clean Sanding Disc Pad Kit contains a dust extraction Hookit™ back up pad, constructed on foam. The backup pad has a 5/16-24 INT thread, with five adapters for converting to: 1/4-20 external threads, 1/4-20 INT, 1/4-28 EXT, 5/16-24 EXT, or 6mm-1.0 EXT threads.