Great for hand built clay projects! The Activa Clay Roller Kit offers a smooth rolling surface, a rolling pin and 4 sets of rails for consistency of height in 4 sizes when rolling out your clay. Included in the kit are a 10 in. rolling board and pin. Plus sets of rails in 1/16 in., 1/8 in., 3/16 in. and 1/4 in. The 10 in. board gives you a non-stick surface to work on when texturing, stamping, blending or cutting clay.