This unit is a big time-saver for plumbing and leveling posts and beams. Being held in place by the rubber band leaves your hands free for adjusting and securing the post. Double-checking the posts with a framing level after they were secured revealed that the post level was accurate.

They only reason that I rated this level with 4-stars rather than five was that the single rubber band does not pull the level firmly against the post without pressing the level into place. There is enough friction between the level and the wood to prevent both seating faces from firmly contacting the post. Simply pushing the level firmly against the post takes care of this and the rubber band will retain it in that position afterwards. It seems that having two retaining bands, one at each end, rather than a single, centrally located band would be a better design.

The only other small deficiency is that the included rubber band is only large enough to reach around a 4"x4" post. Larger timbers required that additional rubber bands be daisy-chained to reach around. Simple fix for a simple problem.