Only used as a competition hammer a few times. 4 kg, diam. 95mm, IAAF certificate no I-00-0201, stainless steel head, turned on whole surface, accurately situated centre of gravity, filled with special mixture of lead and fine shot, hammer swivel made of high quality hardened galvanized steel, polished and covered with petroleum jelly, with handle and wire, comes with Polanik hammer bag
eBay