Patent ID: 7178790

Claim:
A combination comprising: an axially elongated extruded post having a hollow interior profile and an external profile of uniform cross section, said post having first and second axially elongated grooves opening radially outwardly onto an uninterrupted external profile surface, and said grooves defined by converging groove side walls; at least one reel slidably received inside said hollow post profile; at least one strap guiding device contained within said first groove; a strap opening inside said first groove for running a retractable strap radially outwardly from said reel through said strap opening from said strap guiding device to a groove of an adjacent post; a fastener element in said strap guiding device also inside said first groove for locating the device inside said first groove; and a locking tab in said second groove for engaging said reel at a location spaced from the fastener element in said first groove for anchoring said reel inside said post, said strap guiding device and locking tab contained entirely within said grooves to provide said uninterrupted external profile surface.