On Wed, 5 Aug 2015 05:21:05 +0000 (UTC)
HerHusband wrote:

I currently have a Lumber Wizard 3. It works but often seems finicky,
so I'm never real confident it has found the metal in the wood. For
starters, it has a large 12" wand, but it seems only the 3" or so at
the tip really does anything. I also have to adjust the fine
sensitivity a lot, a hassle that requires a small screwdriver. On
several occasions the thing just sits there blinking the lights back
and forth and no amount of adjustment has any effect. I almost threw
it away last time I used it because I thought it was finally broken.

i have something like this but it has a thumbwheel to calibrate it
i calibrate each time i use it

it is very sensitive and it does find the metal but only if i calibrate
and test it