The extreme tools deluxe tool cart (patent-pending) 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 of the tools in the top drawer. Close the lid to use it as a work surface, and the top drawer pulls open to access your tools. It is the most versatile design you will find! roller bearing slides on the drawers are load-rated 100 lbs per drawer. Plus, we have included pry bar and tool hangers/holders on the sides of the cart. Open the lid to access your pry bars. Close the lid, and they are securely locked in place to prevent theft. Four lockable swivel casters allow you to move the tool cart wherever you need them to go.