These Craft Iron Tips from Purple Cows are for burning, melting, searing, or singeing images in a variety of materials including fabric, leather, wood, acrylic, cork and foam. These six interchangeable tips for use with Sizzle Craft Iron (pcp-5000) and the Melt Craft Iron (pcp-5050), each sold separately. The six interchangeable tips include: heart, circle, oval, square, star, and triangle.