Ford 2004 F150 Heritage Ford 1997-2003 F150 and F250 under 8500 GVW except crew cabThe scientific design of Happijac Camper Anchor tiedowns gives maximum strength while eliminating leverage and stress forces on the truck. Removable rear tiedown coupler rotates to direction of pull, eliminating undesirable torque. Happijac Camper Anchor tiedowns won't bend, twist or fall.Note: Camper Anchor tiedowns do not mount to the frame as do the Happijac Frame Mount tiedowns. Camper Anchor tiedowns are not for use on full-size extended cab, crew cab, 4x4, diesel trucks or with campers over 2500 lbs. These applications require the Happijac Frame mount tiedowns.