Although marketed as an undercabinet (as well as ceiling) mount, there are no screws or nuts included for under cabinet mounting (only huge lag bolts for ceiling joists or into concrete). Also, at least for my tv, it will not hang straight down at 90 degrees and there doesn't seem to be a way to tighten the pivot joint so it will hang straight down. Fortunately in my case i can keep it straight down wedged against the dvd player and set top box on the counter beneath it. Some odd oversights for something that costs more than most TV mounts.