Whether for home, farm, builder or industrial customers, National has all the right hardware in the sizes and finishes you need. With over a century of service National is committed to maintaining the highest level of product quality, innovation and manufacturing technology. Gate accessory essentials like adjustable throw Cane Bolts, door and gate springs and anti-sag Gate Kits are a nice finishing touch for gate access points. Smooth black finish with excellent corrosion resistance because they are triple protected with zinc plate, black finish chromate dip and Black finish baked on enamel finish.