FLEX STACK PACK™ Dolly lets you easily roll your STACK PACK™ setup to, from, and around your garage, workshop, or jobsite. Designed with a robust 250-pound load capacity, it can carry tools, materials, and accessories with ease. The dolly features 360-degree 4-inch casters that glide smoothly while standing up to tough jobsite conditions. Quick-connect latches provide fast and effortless interlocking connectivity, allowing you to quickly stack and unstack toolboxes. Foot brakes keep your stacked load securely locked in place. Tether points are included to secure cargo during transport or long-term storage. A folding storage hook enables the dolly to hang from STACK PACK™ Rack Rail attachments (sold separately), while side grab handles make maneuvering simple and comfortable. This durable dolly is backed by a one-year limited warranty when registered within 30 days of purchase at registermyflex.com. Model Number: FS1701