An adjustable height table cart has lots of uses around the workshop. It's great for unloading heavy items from the back of a truck or just getting things up to a comfortable working height. We've even seen some folks build a wooden bench top for them and use them as an adjustable-height workbench. These cost several hundred dollars at other places, but Harbor Freight has them for just $170 and they'll move and lift up to 500 lbs. Plus: Learn how to build your own sturdy workshop cart here.