CRAFTSMAN TRADESTACK Tool Box with Wheels, Waterproof, Stackable System, Portable Rolling Storage for Indoor/Outdoor Use, 22.5 Inch (CMST21445). 22.1″L x 18″W x 23.5H. Shoulder strap and removable divider. WATER RESISTANT: IP65 material designed for dust and water resistance. EASY TO CONNECT: Automatic stacking with drop-and-lock mechanism. EASY TO REMOVE: One-touch release for quick detaching of units. HIGHLY DURABLE: Structural foam design for rigid walls. STORE LARGE AND HEAVY TOOLS: Large useful volume stores big tools in one place.