Walnut Hollow Hot Stamps are interchangeable and work with all Walnut Hollow Hot Tools. After the Hot Tool has cooled off, use pliers to change out the Hot Stamps. Personalize creative projects with these easy-to-use metal Hot Stamps. Add monograms or words and phrases to various materials such as wood, paper, leather, cork, fabric, and more. Hot Stamps are perfect for making one-of-a-kind craft projects, home decor accents, or personalized gifts. Set includes 26 uppercase letters 5/8" tall.