Maximum strength with all aluminum rust-free welded construction. 750 lb maximum capacity (varies by vehicle). No drilling required as compression clamps secure rack system to bed rail. Aerodynamic load bar with rubber insert provides load support and protects equipment from damage. Great selection of easy to use, time saving accessories designed to integrate with unique tri-slot load bar profile. Set of 4 load stops included. Ideal fit on open bed pickups with 2 sizes available.