The new HD Series truck cap features a heavy-duty, functional design available for all current model trucks. An interior aluminum support framework reinforces the fiberglass cap construction by routing all roof rack and toolbox weight to the bedrail of the pickup truck, which nearly triples load capacities — allowing a 550-lb. capacity on the HD Series roof rack and 200 lbs. in each toolbox. Optional heavy-duty side doors open to provide access to two steel toolbox inserts. For added security, the side and rear doors can be upgraded with aluminum inserts with foldable t-handles featuring BOLT one-key lock technology.