This is a pair of brackets used as extra reinforcement for the horizontal beams. Mostly, this is recommended for use with an extension for a flight stick. These brackets provide unmatched support for your entire horizontal beam, and eliminate any chance of the horizontal beam rolling to the left or right during those intense gaming sessions. These are sold in a pair. You will receive the following items: (2x) Stability Brackets for 10 Series Extrusion, (1x) Double T-Nut with screws, and (1x) Triple T-Nut with screws.