Consists of 3 aluminum mold frames (mold size-1 7/8" x 2 7/8") that can be used alone or quickly assembled (screwed) together to form 7 mold frames with thicknesses of 1/2", 5/8", 3/4", 1 1/8", 1 3/8" and 1 7/8". Redi-cut pieces same size as 7-in-1 mold frame.