Fulton 3x3 Fold Away Bolt-On Hinge Kit The Fulton bolt-on hinge kit converts standard trailer tongues into fold-away configures while preserving the existing coupler. This kit delivers strength at the pivot point with precisely machined heavy-duty hinges made from die cast steel. Features Easy to install bolt-on application Includes complete instruction manual Includes all mounting hardware Only recommended for trailers with steel tongues Z-Max 600 Hour Clear Zinc finish for superior corrosion p