Versatile Crafting - The Acrylic Roller allows you to roll out larger sheets of clay without seams. This is the perfect tool for someone that doesn't have a clay conditioning machine yet. The clear acrylic allows you to see what you are rolling out underneath. It is 8 inches in length which allows you to roll out larger sheets of clay to cover objects like a picture frame in a project. The Sculpey Tools Acrylic Roller works with all types of clay from polymer oven-bake clay, air dry clay, non dry clay and even pottery clay. Tips for using the Sculpey Tools Acrylic Roller - - It is so easy to use! Simply condition a bar of clay in your hands to get it soft, lay on your work surface and use the roller to make a sheet of clay. - When working with polymer oven-bake clay it is important to protect your work surface by using the Sculpey oven safe work mat, a piece of glass, a metal sheet or other favorite work surface. - The clay will not stick to the roller - The roller is easy to clean using soap and water or a baby wipe