StackTech 4-Wheel Cart is a convenient solution for transporting your StackTech tool boxes with ease. The Cart features four heavy-duty 3.9"" swivel hard-rubber casters that maneuver effortlessly through tight spaces. For added stability, the two front casters are equipped with locking mechanisms that ensure the cart stays securely in place during loading, unloading, or when stationary to prevent unintentional rolling. The Cart is designed specifically for StackTech tool boxes and organizers, so they automatically lock into place when stacked on the Cart. Constructed from durable high-performance polymer, this Cart is built to withstand the rigors of daily use in demanding environments. It also has built-in tie-down points to securely anchor straps. Conveniently roll your StackTech tool boxes or workstation from one job to the next with the StackTech 4-Wheel Cart.