These Thor Nylon Hammers have split cast iron head with two nylon faces fastened securely to the handle with two socket head cap screws. Head design allows quick adjustment or replacement of either the handle or the faces, while the faces are designed to wear, and can be rotated for even wear. For use as a heavy-duty, multi purpose soft-faced hammer in most industries for assembly, repair and maintenance operations. Diameter: 70mm (2 3/4 in).Weight: 3625g (7 1/2 lb).