CRAFTER"S COMPANION-Claudine Hellmuth Rock-a-Blocks. Have you ever found your stamped impressions patchy; uneven or smudged? The Rock- a-Blocks stamp mounting system is the answer you all your problems. Its innovative patented technology allows you to achieve perfect results with every impression. The blocks are designed to work using a combination of the rocking action and depth gauge to give even pressure to the application of ink. Just adhere your clear stamp to the Rock-a-Block and your ready to go! This package contains two blocks: 7-1/4x5 inches and 7-/4x2-1/4 inches. Made of translucent green plastic. Stamps not included. Imported.