A collection of Motor Guard's popular Big-Block sanding blocks in an attention grabbing pop-up counter display - The AP-4 Sanding Block Assortment. Featuring all six blocks from the Motor Guard Big-Block collection, the AP-4 assortment powers up hand sanding and makes quick work of the toughest jobs. The Big-Block line powers up hand sanding with a strong and comfortable grip. Three layers of engineered materials permit just the right degree of flexibility to ensure even pressure over the large, flat sanding surface. Exclusive radius edges add to the comfort of the block as well as providing a surface for contour sanding. Big-Blocks are designed for use with 2-3/4" PSA rolls or standard abrasive sheets.