Thor super plastic hammers have a malleable iron head fitted with cylindrical ultra-high molecular weight polythene faces which are designed to wear and be replaced. Available in 3 different weights. The ultra-high molecular weight polythene heads provide high impact, durability and high abrasive resistance. The faces will not fracture, splinter or delaminate. Ideal for use as a general-purpose, soft-faced hammer in engineering applications for assembly, repair and maintenance operations as an alternative to a rawhide faced hammer. Size: 4.Weight 1900g (4 1/2lb).Diameter 50mm (2 in).