Versatile Crafting - The three piece Dual End Tool set is perfect for use with all types of clay: polymer oven-bake clay, air dry clay and non dry clay. The handles are made from polypropylene and are compatible with polymer clay. The tools are made of high quality materials and are durable for all types of clay projects from jewelry making, mixed media, sculpting and home décor! Tips for using the Sculpey Tools Dual End Tools - Each tool has a dual end for maximum creativity - Ergonomic handle allows for comfort crafting - Flexible tip Sizes 5mm / 7mm / 8 mm- Metal ball sizes 2mm/ 6mm /12mm- Always protect your work surface before playing with polymer oven-bake clay. Use the Sculpey Tools oven safe work mat, a piece of glass, a ceramic tile or metal pan. - Use Ball End Stylus to make indentations, add details and create curled edges. These are perfect for varying sizes for mokume gane impressions. - Use Flexible Shapers to shape and smooth clays, blend seams, create patterns and textures.- Great for all types of projects from jewelry making, mixed media, sculpting and home décor! - The tools are easy to clean with soap and water or use a baby wipe