The Brackets are make of metal, smoother edges, rustproof, resist weather, with long lasting durability The joists hangers are, firmly fixed and not easy to loosen, easy to operate Suitable for deck railing, porch railing, wood fence, barn projects, pergolabuilding, joists hangers U shaped bracket designs accommodates various lumber sizes while providing sturdy and stable connection points Perfect for fencing, decks, posts, beams, fence handrails, porch railings and shutters, Manufacturer: Oxxggkao