Hand-operated hand tools and implements, particularly screwdrivers, allen keys, hammers with fittings of synthetic material, graving tools, center punches, percussion hammers, nail punches, reamer; punches, scribing irons, spanner keys and scoring knives for veneer sheets; components and accessories for hand tools, particularly screwdriver tips; special cases of synthetic materials for hand tools, as well as structural parts and fittings therefor