Our new Strong SM-F and SM-T mounts have slightly reduced weight ratings with the ultimate goal of going slimmer. But, we did not compromise on build quality to do so. Pick one up, and you will feel the beefy 2.5mm thick steel (that's right between 12 & 13 gauge) used to make them. You will also notice the post installation leveling screws, built-on lockable tabs and easy to use wall plate to help make the job that much easier. Underneath it beautiful black powder coat of the SM-F-L mount is 2.5mm of solid steel. Flat panels are getting thinner and thinner. So should mounts holding them. With TV's losing weight and getting slim, it was time to trim some fat off our mounts. Our wall-hugging SM-F-L mounts are only 1-1/8" deep for an extra low profile. Leveling a mount is fairly straightforward and rather simple - except when you face a unlevel mantle or just slightly sloped ceiling. We understand the pain of having to re-level an installed mount, so our SM-F mounts include post-install leveling screws for last minute adjustments. Most installer worries we surveyed are in regards to kids knocking the TV off the mount, while some are protecting the TV from being stolen. Our new Strong™ fixed and tilt mounts now include LokTight™ rotating lockable tabs directly on the arms themselves. The lockable tabs keep the arms against the mount, eliminate easy lifting from curious kids, and allows for a locking device to be added for security measures. Two, it's reversible so there is no set top or bottom, which means no confusion. Three, the wide mouth in the center allows for easy placement over a large Midi plate.