Enclosed pivot bracket houses the spring assembly, which protects the driver from breakage and can double as a fender support bracket. Injection molded HDPE plastic elbows provide longer service life due to its durability and shock loading properties Custom extruded 6061-T6 aluminum arms provide years of rust free operation and continued good looks Heavy Duty EPDM rubber isolators keep your arms from banging against the container while providing a longer tarp life. Custom designed hydraulic motor is coupled to a 60:1, right angle, worm gear drive that provides a quick and easy operation. Raise the gantry, deploy the tarp out over the load, lower the gantry. Just how much simplier can it be? Optional inside cab controls. Optional electric motor versus hydraulic motor.