The VP4X4J-Lock load lock rack is a lockable, anti-theft storage and security system that easily mounts nearly anywhere on your truck to safeguard your load locks when not in use. Four styles ensure that there's a J-Lock especially suitable for your rig. J-Locks are manufactured in either 2 or 4 bay versions to fit your specific need. Each load lock is securely cradled to ensure no movement -- either side to side or up and down. J-Locks secure both 1 1/2" or 1 5/8" bars. J-Locks also accommodate 2" x 4" or 4" X 4" pads. If you have any questions about installation, please contact us. We have brackets for some truck makes and models to make installation easier.