QUICK-CONNECT - Fast and effortless interlocking connectivity allows you to quickly stack and unstack toolboxes 250 LB. LOAD CAPACITY - Heavy load capacity for tools, materials, and accessories IMPACT PROTECTION - Built with an impact-resistant polypropylene body and aluminum-reinforced corners to withstand the toughest jobsite conditions IP65 PROTECTION - All-weather protection to shield your tools from the elements when you're on the job 9" RUGGED WHEELS - Conquer any terrain with oversized rubber wheels REMOVABLE TELESCOPING HANDLE - Extends for easy jobsite navigation and removes fully for storage in a covered truck bed when your work is done EASY ACCESS - Gas struts aid opening and closing of the lid, and keep it propped open securely for easy tool access when needed WHAT'S INCLUDED - (1) FLEX STACK PACK Rolling Tool Box, (1) FLEX STACK PACK Medium Tool Box, (1) FLEX STACK PACK Suitcase Tool Box, (2) Removable Accessory Trays, (4) Organizer Cases with dividers FULL RANGE COMPATIBILITY - STACK PACK Toolboxes, organizers, accessory cases, and toolbox attachments are endlessly configurable across the full STACK PACK system ONE-YEAR WARRANTY - Register your new products and get a limited one-year warranty on your FLEX STACK PACK tool boxes and organizers