If you are looking for this tool, then you are well aware what is it for. But... Small description:
This is a clock repair man best tool and the essential part of a clock repair process.
Attach the clamps to your movement plates to position them for repairs, work on the clock in a horizontal position. Test the clock using the hanger and clamps.
The posts are approximately 2 3/4" in height including the holder.
Pictures with the clock for illustration purposes only.