All of my workshop ( machines ) are on wheels so they can easily be moved around for ease of use and cleaning. This hook was made from a length of 1/2" electrical conduit, 1" metal strap and a piece of 5/16" rod for the hook. All the pieces were brazed with my Oxy-acetylene set.

Step 1: Typical Machines That Can Be Easily Moved

Pictured are a couple of examples of the tools that are easily moved around with this hook.

I cannot take credit for this hook, I saw a milk delivery guy bringing in milk crates by dragging them along the floor. I took note of that and promptly came home and made my own version. If you wish to make one just make it to the dimensions that suit you.