Features(4 each) Slider boxes (for welding to your gillnet frame)(4 Each) Slider locking plates (for bolting to your gillnet frame)(4 Each) Nylon rollers and axle pins (aluminum or stainless steel rollers with 660 bronze bushings are available as an option)(2 Each) Aluminum I-beam Rails (up to 25 Foot in length each, cut to your length)(1 Only T-Bar locking kit (consists of two spring-loaded T-shafts with detent tubes)NOTE: I-Beams must be securelyfastened to vesselby the customer, to handle not only the weight of the gillnet drum and net, but the total intended hauling load as well. Slider boxes and T-bardetent tubes must be welded to gillnet frame by customer, and I-beams must be drilled into the I-beam for the Locking T-shafts to engage the I-beams.