As a full-time residential remodeler, I am constantly trying to establish plumb and level reference marks. In the past, I've done this with spirit levels, but recently I tried doing it with a PLS2 loaned to me by Pacific Laser Systems.

The PLS2 is a self-leveling laser-line tool that projects visible vertical and horizontal lines. It has four functions, all controlled by the "on" button: Press the button once for a level line, twice for a plumb line, and three times to project cross hairs consisting of a plumb and a vertical line. If you press the button a fourth...

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