Review on Swanson Tool SL0002 Surface Level by Chris Nonamaker

Good: - Seems to work fairly well - Concentric rings give a good indication of the level of (in)accuracy. There was various debris and sand in the package (I wonder how it got there). Does not affect bladder visibility. Do not use for precise things: the black sphere in the center seems a bit off-center in relation to the black lines. Maybe it's just me.