The 3M Hookit Back-up Pad is available in soft, medium and hard foam densities for support during jobs from paint removal to fine finishing. Center-hole pads feature flat rigid centers and softer edges, providing added control. The 6- and 7-in. pads feature several hole patterns to promote dust extraction. Hookit attachment system makes changing discs fast and easy.A Back-up Pad for Faster, Easier, Better Sanding Designed for use with 3M Hookit abrasive discs, our 3M Hookit Back-up Pad is built for added support, control and speed during automotive sanding jobs from paint removal to polishing. These 6” and 7” pads are available with soft, medium and hard density foam for a range of applications from paint stripping to polishing. Each center-hole pad features a flat, rigid center for support and softer, tapered edges for added control. Seven-hole or 15-hole patterns are built in to improve dust extraction, reduce loading and increase abrasive life. Disc pads are available with 5/8-11 interior threads to fit a variety of low-speed (maximum 3000 RPM) power polishing and sanding tools. About Our Hookit Attachment System for Faster Change-Outs The Hookit attachment system has a hook-and-loop feature which makes disc attachment, removal, and re-attachment clean and easy. It also facilitates use and re-use of the disc for maximum product life. Hookit sheets have a brushed nylon loop backing of the type most commonly used in everyday hook-and-loop applications. A range of Hookit disc backup pads features hooks which grip the brushed nylon loop backing. It’s simple: just attach the disc and start sanding. The disc removes just as cleanly and easily. The Hookit system is designed for work spaces and applications where adhesive backed abrasives may become contaminated by dust, dirt or debris.