MAGNESPOT XR1000 Reference Point Locator 

As an Electrical Contractor for many years, this "tool" seems worth it's price. Many many years ago I "Blindly" drilled into a pipe chase after going back and forth measuring and noting locations of water pipes and electrical conduits. Needless to say, Damned if I didn't drill straight into a 1-1/2" water riser that was connected to a water tank on the roof of the 17 story building I was in. Long story short, by the time we got the water shut off, there was over a 100 grand worth of damage to several offices and a computer room with tape drives. This item I definitely will be buying.

You still need to be somewhat ballsy to drill blind like that through concrete...and by "blind", I mean that it is still possible that the block has vertical lines, electrical, pipes, gas, water, etc running through it....not likely, but definitely possible....not to code, but definitely possible. Furthermore, I have seen walls (two different occasions) that have been "double-blocked"...in that, there was a block wall, a 3 to 4" hollow space, and then another block wall. From inside and outside, it seemed like single-wall thickness....yet, there were two walls, with miscellaneous items in between. I've also drilled thru drywall and hit concrete (the drywall was placed over existing concrete during a remodel)...another time, I drilled thru drywall and heard glass shatter....same thing, a remodel of drywall over a window. Everyone should be very careful....none of these tools are magical, and they are NOT like an Xray machine as is sometimes suggested in the Magnespot marketing material. Double-check, triple-check...even more...do everything you can to avoid drilling *blindly*. Assume as little as possible.

Man, I have a Magnespot and Magnepull on my AT&T truck and use them maybe twice a year.. but seriously just read the brick. There's phone lines going thru the cinder block from the network interface, just reference that on the other side. If one side was sterile it'd make sense.

I bought it. Brilliant !