TOOL-FREE BOX MOUNTING – Transition from STACK PACK™ setup to wall in seconds 16” ON CENTER – Mounts on walls with standard 16-inch stud spacing without the guesswork 300 LB. LOAD CAPACITY – Heavy load capacity for mounting STACK PACK™ boxes to the wall VERSATILE MOUNTING OPTIONS – For use with a wide range of STACK PACK™ items THREADED HOLES – Expands rail functionality for adding storage hooks or using for tie down anchoring in a trailer COMPATIBLE WITH SELECT STACK PACK™ ITEMS – Including the STACK PACK™ Crate (FS1104), Medium Tool Box (FS1102), Drawers and Cabinet (FS1105, FS1106, FS1107) WHAT’S INCLUDED – (2) Wall-mount rails