At first this item seemed very sturdy and ideal. However after only a week's use, the black plastic ring that the inner tube rides in came out of the larger tube. This allowed the upper tube to cant over on an angle, and as a result the small pin (used to adjust the height) would barely hold on in the adjustment hole, and often would actually not hold. This renders the product useless as sold.I had to figure out what height I wanted to set the bar at, then drill a hole completely through and install a bolt and nut. It works now but.... no more adjustability. Small changes in the manufacture of this item would create a GREAT product. Unsatisfactory as is though.