Bed rail mounted cross bed tool box for compact pickup truck, I ran it on my Chevy S10. Should fit beds with inside width between rails of 54" through 59". I suppose it could also be floor mounted to trailer, flatbed or larger truck bed floor. Box has been coated with Line-X bed liner by Tri-City Line-X. Has an internal sliding tray and key for lid locks. 60" wide, 13" tall (7" above rail), 20-1/2" deep