With the help of the stamping letters, you can label your workpieces. To do this, the small metal pins are placed on the wood and (gently) tapped on the other end with a hammer. This way, names can easily be stamped onto items like tealights or wood. It's great fun, especially for children who are just learning the alphabet. This allows the newly learned skills to be reinforced in a playful way. Letter stamping is a lot of fun. The letters are approximately 4 mm high. A hammer is not included in the delivery.