These billet hinges were developed to be used for opening bed floors. They can be used in a variety of applications though. The mounting bolt pattern on the base is 2-5/8" square (left to right and top to bottom). The upper mount fits a 1" wide tube.

These are constructed out of aluminum and feature ball bearings at the pivot points. All the hardware on the hinges themselves are counter bored for a flush design. All the hardware is included with these hinges, including pan head bolts to attach the 1" tube on the upper pivot, and socket head bolts to attach the base to your mounting surface.