Overall, I like the Shinwa 78610. Even though I have a decent capacitative stud finder, I often seem to end up using a 1/16" drill to probe for studs, anyway. And if I'm looking for joists in the ceiling instead of studs in the wall, mechanical probing is pretty much my only option, because inevitably the ceilings in my homes seem to have popcorn texture which prevents the use of any kind of instrument you have to slide across the surface. So for that use alone, I'm glad I've got the Shinwa in my toolbox and think it's worth the $15.
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MultiScanner i520 One Step quickly and easily locates the edges and center of wood and metal studs and joists behind walls floors and ceilings. It also locates metal as well as live AC electrical wiring. A 4-mode switch makes it easy to change functions while the ultra-bright display screen Spot Lite Pointing System and audio tone all indicate the location of the target. The signal strength indicator helps to distinguish between shallow and deep targets.
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