Unlike standard truck bed toolbox clamps, the ABN Truck Tool Box Clamps 6-Pack secures your toolbox in place without damaging your bed rails by bending or drilling. The truck tool box install kit has a 1.2-inch inner width and 3.25-inch clamp space on tool box mounting hardware to fit your truck bed rail. Measure your rail for exact fitment. The aluminum alloy construction of these truck tool box brackets provides maximum strength and is resistance to corrosion. To install, wrap the truck box mounting hardware around the bed rail so the grooved face plate presses against the underside of the bed rail, then insert the bolt through the anchor to your truck toolbox and secure in place by tightening with your existing wrench or ratchet. This toolbox tie down kit includes 6 tool box J hooks. Warning: This product can expose you to chemicals which is [are] known to the State of California to cause cancer and birth defects or other reproductive harm.