The Thor super Plastic split head hammers have a split cast iron head with two white super plastic faces fastened securely to the handle with two socket head cap screws. There are 5 different weights to choose from in this range. 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. Size: 1.Diameter: 32mm (1 1/4in).Weight: 690g (1 1/2lb).