Compared to the Milwaukee Cordless Detection Tool, your puny stud finder is only a toy. OK, we’re not sure about finding your keys, but it can detect rebar buried 6″ deep in concrete. It can also tell you the location and depth of wood, PEX, PVC, and metal behind gypsum, OSB, ceramic tile, and marble.
This pistol-grip cordless tool is yet another tool that uses Milwaukee’s M12 Lithium-ion battery. Gliding over surfaces on four wheels, it can differentiate between ferrous and non-ferrous metals and can even detect live wires. The white-on-black display with backlight will even show you the center and edges of studs.
If Google’s got it right you can pick up the Sub-Scanner starting at $200, but a more reasonable source like Ohio Power Tool has it listed for $310 without battery.