Spectra gives you the perfect laser that's both accurate and durable enough to withstand even the toughest construction site conditions with this Apache Storm Laserometer (ATI99400009). Waterproof and resilient enough to survive drops onto concrete, it's highly accurate and remembers your previous setting even after changing the batteries. It conveniently shows you high, low and on-grade and how far you are from on-grade.  The huge vertical reception range lets you find the beam quickly, even at long distances.  Plus, it's designed with SuperCell technology, which uses durable acrylic components rather than fragile soldered components of traditional methods.