U.S. Industrial Tool And Supply Co. Wood Slappers - Set Of 3, all three are 14” long. TPA-5514 (Gentle Curve) - used TPA-5515 (Medium Curve) - new TPA-5516 (Sharp Curve) - new From the manufacture’s website: These slappers are made from select hard maple. They are used like a hammer or mallet to shape metal. Three different shaped slappers are available that are designed to form the desired curve in the metal. Slappers can be used to form metal over a shot bag, tee dollies or many other self made dies. Leather covers are also available and should be used when forming aluminum to avoid marring the surface.