The relatively new Bosch Multi-Detector DMD4K at first glance looks like a glorified stud finder but this little gizmo does way more than allow you to point it at yourself and make bad jokes. It does detect wood studs however it also can detect metal and let you know if the metal is ferrous (magnetic) or non-ferrous (non-magnetic). In addition it has a zoom feature which allows you to detect material that is deeper in the material (up to 4”). Recently during a job site demo we used the DMD4K to find rebar in concrete barriers several inches deep in concrete. There is a gauge to tell you how strong the signal is and coupled with the zoom feature it is pretty easy to exactly pin point any pipe, wire or stud. Once the material is located it is easy to mark it through the illuminated hole in the center of the detector, large enough for any standard pencil. Note, don't use a mechanical pencil or metal pen as the metal next to the detector throws off your readings.  The detector also can detect live electric lines and has a separate gauge for the strength of line. This is a big convenience and an even bigger safety feature for demolition work.

The DMD4K is a great tool which you can get at Ohio Power Tool for $89.00. It is also available for free if you buy a Bulldog SDS-Plus Rotary Hammer 11255VSR ($239). It is shipped right with the tool smae day if ordered before 1:00pm EST, no mail-in rebate or anything like that. The DMD4K is very useful for any contractor, handyman, plumber, electrician, you name it.