C.S. Osborne Riveting-Hammer #00,  a Riveting Hammer #2/0  weigh is 3oz. A quality riveting-hammer Made in the US used by professional in metalsmithing, jewelry making, as well as in the furniture upholstry.  The best quality riveting hammer used for forming, riveting, and tacking.  Hammer has one end is flat and the other is chisel-shaped.  Rivetting hammer is drop-forged steel, polished head is mounted on a hickory hardwood handle.  Hammer Face has a 3/8" in diameter and the head length is

3-3/8" long.  C.S. Osborne #57 - 00 3 oz.  Made in USA.