This is three piece mold frame offers you the convenience of having a combination of seven mold thicknesses at your disposal. Three frames which are securely held together with screws enable the user to make many different sizes. Comes with extra screws which allow you to adjust the choice of thickness from ¹⁄2", 5⁄8", ³⁄4", 1¹⁄8", 1¹⁄4", 1³⁄4", 17⁄8" frames