Honestly, I want to like this unit but it came with a damaged screw and very badly bowed cleat so installing this level wasn't a walk in the park. Because of the bowed wood, the unit does not sit evenly across the cleat (the middle is holding most of the weight rather than it being spread across the entire cleat). Pre-drilled holes are a nice touch on the cleat but they are 12" apart and I have 16" spacing so now I had to drill my own... not there are visible holes in the unit, they should have included more of the stickers ot cover all the screws anyway.

Overall, wouldn't recommend it.