Bolt-on mounting/No drill installation;Semi-universal fitment of full-sized and mid-sized trucks;Mounting capabilities-roof top tents or flat/basket rack to increase storage capacity;Universal mounting options for most aftermarket accessories;Hallowed out design,great for routing light accessories;Low-profile for improved aerodynamics with tent;Rugged design for on and off-road use;700lbs static load/250lbs Dynamic load;Mounted height from bed rails: 9.5"";Adjustable width:inside bed width: 49""-63.5"";Overall length: 47"";5-year finish, lifetime structural warranty;California Residents: WARNING