A trim-type hammer having a recess in its elongated handle housing a stud finder secured within by a lip having an impact member to mark the location on a sheetrocked wall overlying a stud beneath. A first cutting jaw extends from a first end of the first handle, and a second cutting jaw extends from a first end of the second handle. The antenna circuit includes an antenna element to generate the electromagnetic signal. The system may be fully IP68 waterproof rated.