6 Metal castings and metal forgings; worked and unworked castings and forgings, in particular forgings of unalloyed, alloyed, rust and/or acid resistant metal materials, worked and unworked castings and forgings made of steel; metal forgings made by drop forging; chain tensioners made of metal, rope tensioners made of metal, belt tensioners made of metal; metal guidance for guiding chains, ropes, and belts, namely, metal guide bars, metal guide rails, metal guide rods, metal guide conducts; metal shorteners for adjusting the length of a chain, rope and belt, namely, shortening claws, shortening hooks, shortening clutches and shortening couplers, metal connectors and connecting links for chains, rope and belts; metal connectors and connecting links for chains, ropes and belts; metal chain connectors; metal chain joints and chain links; metal lifting chains and ropes, thin metal bands, belts of metal for handing loads, metal slings for loading, wire rope slings, cargo slings of metal; mechanical fastening elements of metal, metal bars, metal chains, wire nets, metal beams, metal hooks, metal catch hooks, metal single hooks, metal double hooks, metal fork head hooks, metal eye hooks, metal sliding hooks, metal wide-mouth hooks, metal eyes, long swivel eyes of metal, swivels, grabs and claws, eyes, claws, shackles and spreader struts of metal; metal securing elements for lifting, lashing and fastening means, namely, hook catches, cotter pins, pins, rings bolts, screws