This is a set of Tactical Assault Panel (TAP) shoulder adapters that are used in the US Army. The adapters allow the user to mount compatible tactical panels to their body armor. You mount these adapters to the shoulder straps of body armor. First, you detach your shoulder straps. Then, you place the adapters on the straps before reattaching them. Also, the adapters have D Rings for attaching tactical panel straps securely. The adapters come as a set, with a right and left shoulder adapter.