The Sky Bar Series is a telescoping system which allows for fit to most vehicles. It s square-tube construction provides for optimum, small dimensional strength. Adjustable bracket assemblies assure mounting of most weapons/accessories and may be firmly secured by tightening the set-screws (provided) on the backside of each bracket. As with big sky racks BSR series racks, they incorporate high quality construction, thick, non-abrasive gun protection padding, and heavy duty nylon fabric fastening straps with hook and loop adhering system.