The two-part DrillSpotter helps accurately place exit holes so drill bits don't damage adjacent mechanicals or finished spaces.
The two-part DrillSpotter helps accurately place exit holes so drill bits don't damage adjacent mechanicals or finished spaces.

Drilling a hole through a foundation wall or between floors can sometimes be a "guess and hope" job: guess where to drill and hope you don't destroy anything. Recently, I had to run some wires through a block foundation in a finished basement. A small closet allowed access on the inside, and on the outside, I had only a few inches of clearance around obstacles. Drilling the hole once was the only option, and that led me to the DrillSpotter (First Edition Products, 877/276-7300, www.drillspotter.com).

This electronic tool, consisting of a transmitter and a receiver, helps locate the exit point of your drill bit. The manufacturer claims that it works with walls up to 40 inches thick — even through solid concrete. I didn't have an opportunity to check its accuracy through such thick material, but I did find it handy a number of times on several...

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