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: 2.Weight 790g (1 3/4lb).Diameter 38mm (1 1/2 in).