The Rose Brand telescoping, heavy duty, 2" diameter, anodized aluminum upright is easy to use, with no tools required. Just slide the upright over the Slip-Fit Pin on the base, and quickly adjust to any height within the specific model range. The Slip-Lock Collar Assembly locks automatically when the inner pole is raised vertically to the desired height. The more pressure applied downward, the tighter it will lock. To release the lock, simply raise the inner pole slightly and press on the release ring. For safety, hold the inner pole firmly while adjusting the height.