Happijac 182861 Camper Anchor Tie-Down Uses leverage to safely reduce the force on your truck and control camper movement in all directions Counter-balances against the pulling weight of the camper and reducing force against the truck frame Provides total control of front-back, up-down, and side-to-side movements CA-FD7 fits 1997-2003 Ford F150 and F250 models under 8500 GVW Not for use on full-size extended cab, crew cab, 4x4, or diesel trucks or with campers over 2500 lbs.