Our 3M™ Hookit™ clean sanding painter's back-up pad is excellent for auto body painting jobs such as following contours and sanding close to edges, while maximizing dust extraction. This soft density foam pad features our clean sanding 6-hole pattern for effective dust evacuation with 6-hole discs. Our Hookit™ attachment makes disc change-out fast and easy, maximizing disc life. We designed our 3M™ Hookit™ clean sanding painter's back-up pad for auto body sanding jobs requiring a finer finish, such as application of color, primer and clear coat. The 6 in Dia soft-density foam body has a 15 deg taper for flexibility when sanding along contours or close to edges. The disc pad features 5/16-24 external threads which are compatible with orbital or random orbital sanders that have 5/16-24 internal threads.