Shoe Boot Stretcher For Cowboy Boots, Shoe Boot Expander For Thick Feet and Wide Feet, Pair of Boot Stretcher

These stretchers worked great on stretching my ostrich boots. A few months back they began hurting my feet so I didn't wear them very often. I stretched them for two days and they fit great. The only issue, which was not a problem, was that the boots are high top so the top of the boots got in the way when I turned the tightening rod but I simply held the boot top down. One person said they had to almost put the tightening rod flat but I didn't have that problem. The rod worked better if not held at a 90 degree angel but it only took a slight angle and the rotating gears worked great. There are no instructions so I didn't know what the one black piece was for.