Extreme Tools EX Professional Series 33 in. 4-Drawer Deluxe Tool Cart can be used as a stand-alone tool cart or it can be combined with the Extreme Portable Workstation. The most unique feature of this tool cart is the top storage compartment. Open the lid and you can access all your tools in the top drawer as well as tool hangers/holders on the sides of the cart. The closed lid securely holds a PVC coated MDF top creating a durable work surface and still allows access to the top drawer.