Kit contains six blocks in a blister pack shipper, to be used as an accessory item with Hookit™ abrasive products for sanding filler, primer and other substrates: one each - 1-3/8” x 10-3/4”, 1-1/4" x 10-3/4 round; 2-1/2" x 5-3/8", 2-5/8" x 5-1/4", 2-5/8" x 10-3/4"; and 2-1/8" x 10-3/4 teardrop.