I felt the plastic clips on the dial indicator brackets I was downloading left to much variation. I added the chrome spacers so the metal rods had an exact surface to ride on every time. This seemed to work much better for me in bed leveling. The spacers I used were just spare parts laying in my garage. I would imagine you could use a chrome socket? Just about anything you can think of. I used fusion 360 to create it and included the file so you can adjust as needed.