Many of the tools in my shop are mounted on casters for mobility. But I often have an issue with a tool rocking back and forth because the casters don’t rest evenly on the floor. So I came up with a way to quickly level the casters. As you can see in the photo above, I made a set of upside down ‘T’s with casters. I mounted them to the side of the cabinet using a single bolt at the bottom and an adjustment knob at the top. This lets me move and level the cabinet at one time. To stabilize the cabinet, loosen the knobs and pivot the ‘T’s to get a solid footing, then tighten the knobs. The bolt lets the ‘T’ pivot in either direction on each side, while the cabinet floats independently.