Features: QUICK-CONNECT - Fast and effortless interlocking connectivity allows you to quickly stack and unstack toolboxes. 500 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 wheels. REMOVABLE TELESCOPING HANDLE - Extends for easy jobsite navigation and removes fully for storage in a covered truck bed when your work is done. FULL RANGE COMPATIBILITY - Toolboxes, organizers, and accessory cases are endlessly configurable across the full STACK PACK™ system. Details: Pack everything you need for a day on the job with the FLEX STACK PACK™ 3-Pc. Storage System. Quick-connect interlocking attachment points offer fast and effortless connectivity to customize your layout with any piece in the STACK PACK™ storage system. IP65 all-weather protection shields your tools and accessories from the elements, and an impact-resistant polypropylene body with aluminum reinforced corners offers protection from the toughest jobsite conditions. Complete with the STACK PACK™ Rolling Tool Box, Medium Tool Box, and Suitcase Tool Box, you’ll have enough storage to bring the workshop with you to and from the jobsite.