oh, im not going to buy it. . .my gps does a good job at big measurements, and im going to start carrying a tape measure for small ones. Considering i have only found one cache, and one benchmark, i cant really say what im going to carry.
I dont have one, but those laser tape measures for sale at the home depot look like they could do the job. . .unless there is an obstruction. may i also suggest, as a few others have, a metal detector.