The Mule is a very versatile lifter, stacker, work positioner, and portable workbench that can be used in a variety of applications ranging from office environments to heavy manufacturing.  The Mule has a 350 pound capacity and can lift from 3½ inches to 48 inches with a screw drive (similar to new style garage door openers).  The 18 inch by 18 inch platform uses repositionable work blocks to secure different shapes and sizes and has a working vise which expands an additional 10 inches for a variety of applications.  The back wheels have locking disc brakes that allow you to secure the Mule in place for loading and unloading.  The Mule can move on four wheels like a cart or be rocked back and moved like a hand truck (which is great if you need to go over a curb).  The whole unit can fold up; so it can be transported by a car or delivery truck and/or stored in a closet.