Check the listing for details. Fulton 3" x 4" Bolt-On Trailer Hinge Kit Fold-Away Coupler 7,500 lb Tongue Frame. Condition: New. Listed at 119.99 USD. Fulton High Performance Series Fold-Away™ hinge kits are ideal for boat trailers that can be just a little too long to fit inside smaller garages. These high quality, precision engineered products provide options for solving this common problem. Converts standard trailer tongues into fold-away configurations while preserving the existing coupler Delivers strength at the pivot point with precisely machined heavy duty hinges made from die cast steel Easy to install bolt-on application with complete instruction manual Includes all mounting hardware Only recommended for trailers with steel tongue Specifcations: Application: 3" x 4" trailer tongue For use on trailers with material thickness between .188" and.120" Z-Max 600 hour clear zinc finish 7,500 lbs Capacity 5-Year warranty Popular applications include canoe kayak Shorland'r Shorelander Karavan Boston Watercarft Whaler Dauntless Crownline Jet Ski and many many other non aluminum trailersFulton High Performance Series Fold-Away™ hinge kits are ideal for boat trailers that can be just a little too long to fit inside smaller garages. These high quality, precision engineered products provide options for solving this common problem. Converts standard trailer tongues into fold-away configurations while preserving the existing coupler Delivers strength at the pivot point with precisely machined heavy duty hinges made from die cast steel Easy to install bolt-on application with complete instruction manual Includes all mounting hardware Only recommended for trailers with steel tongue Specifcations: Application: 3" x 4" trailer tongue For use on trailers with material thickness between .188" and.120" Z-Max 600 hour clear zinc finish 7,500 lbs Capacity 5-Year warranty Popular applications include canoe kayak Shorland'r Shorelander Karavan Boston Watercarft Whaler Dauntless Crownline Jet Ski and many many other non aluminum trailers