FLEX Stack Pack Storage System a versatile and durable solution for organizing and transporting your tools. This system includes three distinct storage units: a Rolling Tool Box, a Medium Tool Box, and a Suitcase Tool Box, each designed for all-weather protection with an IP65 rating. Constructed from impact-resistant polypropylene and reinforced with aluminum corners, these tool boxes are built to withstand tough jobsite conditions. They easily connect together for convenient stacking and feature a 250 lb. load capacity, making it simple to bring your entire workshop wherever you go. The rubber wheels are designed to handle any terrain, while the removable handle allows for effortless towing. Gas struts keep each lid propped open, allowing quick and easy access to your tools as you work. The system also includes two removable accessory trays and four organizer cases with dividers to keep everything neatly arranged. Model Number: FSM1101-3