Check the listing for details. 1-3/8" Copper Bopper: flint knapping tools, flintknapping, billet. Condition: New. Listed at 27.00 USD. This is a 1-3/8" Bopper Excellent performance. The best billet for the money, but will not hold up to miss use and abuse. A favorite tool of the majority of today's knappers. Copper Boppers have a "weight forward" feel that provides accuracy and a fast swing. These billets have helped knappers reach new plateau in thinning, they are forgiving to error, but, like a tire, they will eventually wear out. The better knapper you are, the longer they will last. Constructed in the same manner as the 1 5/8"billet. It too boasts incredible durability. Constructed with a hard wood handle coated with rubber for a positive grip! Each ergonomically contoured hard wood handle is hand lathe turned by us at our modern factory here in America with quality as paramount. Applications: * Bi-face trimming * Large finish work Tool Weight: 8 Oz. Free Priority Mail Shipping! Check out our other flint knapping supplies in our Ebay Store!