Featuring six blocks from the Motor Guard Rigid Block collection, the AP-5 assortment powers up hand sanding and makes quick work of the toughest jobs. Offered in both standard and hook faced versions, these blocks are engineered from super-dense yet light-weight materials and provide just the right amount of flex to conform to body panels and slight contours on both steel and aluminum body panels. Ultra-flat faces result in fast and flawless finishes.