From the Manufacturer:
This HotStamps Alphabet Set, Uppercase is a must-have for any crafter, artist, or DIY enthusiast. These metal stamps are perfect for wood burning, leather stamping, and calligraphy projects. With their interchangeable design, they work with all standard threaded Walnut Hollow Hot Tools, and can easily be changed out using pliers. These stamps are perfect for personalizing creative projects, and are suitable for use on a wide range of materials, including wood, leather, cork, fabric, and more. Get ready to inspire your creativity and make one-of-a-kind craft projects, home décor accents, or personalized gifts with the Walnut Hollow HotStamps Alphabet Set, plus our full line of wood burning tools and surfaces, including live edge rounds and planks.