KLEIN 54818MB MODbox™ Internal Rail Accessory SECURE STORAGE: MODbox Internal Rail Accessory keeps rail attachments securely in place inside Rolling and Medium Toolboxes (Cat. Nos. 54100MBX) PREVENT SHIFTING: Keep rail attachments from shifting inside the toolbox when not in use on the outside rails CUSTOMIZABLE ORGANIZATION: Easily customize storage and prevent clutter with the Internal Rail Accessory for MODbox Toolboxes HANDLE VERSATILITY: Insert the Internal Rail Accessory with the handle side up or down to accommodate different tools and clearance needs MORE CLEARANCE: Place the handle side up to provide additional clearance for taller hand tools OPTIMAL STORAGE: Place the handle side down to maximize clearance for items at the bottom of the toolbox UNIVERSAL COMPATIBILITY: Compatible with all MODbox side rail attachments, including Tool Carrier, Parts Bin, Multi-Hook, Cup Holder, and Magnetic Strip