The height adjustment mechanism on the stand is poorly made, does not tighten well. Tightening was done with a plastic handle with a knurled screw. The rest of this assembly was poor quality metal. She walked over and began tightening the collar with a hand tool. After a while it wasn't worth it anymore. It turned out that the V-leg design limits usefulness, as the main arm can't move left and right far enough once I put my foot between pieces of furniture.