UPDATE: almost 5 years later and still using this daily with no issues!!Been looking at these for awhile. Glad I got one for Xmas! I assembled with minimal help from the husband. 3 ways to mount the monitor pole in directions. I simply removed the plastic piece and ring on the desk (top level) and mounted the pole there using the second option in the directions! Very sturdy, no wobble.Another tip, last page on instructions show you how to adjust the spring arm if you have a hard time lifting or lowering. Works perfectly! I have 2 22 inch monitors that weight approx 15 lbs each. NO issues! Even have enough room to sit my docking station on the desk portion so I could use 3 monitors if I wanted too!They seriously thought to include everything in the package, and in the design. The cord manager that installs on the monitor pole even includes storage for the 3 Allen wenches you will need to make adjustments to tension on monitor arms and the spring arm. (Lots of flexibility in monitor arm adjustments which is why I chose this model).A must buy at a great price! Measure carefully, it was slightly bigger than I thought, but still works well (my fault for not looking). Fair warning, it is heavy, but needs to be for stability...