THE DIFFERENCE IS THE TOOL

ELECTRIC AND BATTERY OPERATED ELECTRONIC MEASURING, SENSING, AND DETECTING TOOLS, NAMELY ELECTRONIC TAPE MEASURES; ELECTRONIC, ULTRASONIC, AND LASER DISTANCE MEASURING APPARATUS; ELECTRONIC PLUMB LEVELS; PLUMB BOBS; PLUMBS; ELECTRONIC ANGLE MEASURING APPARATUS AND INCLINOMETERS; ELECTRONIC SCANNERS FOR LOCATING WALL STUDS, NAILS, AND OTHER OBJECTS LOCATED BEHIND WALLS; VOLTAGE SENSORS, DETECTORS, AND TRACERS; PLANES; STUD SENSING FINDERS; LEVELS; TRANSITS; METAL DETECTORS; HIDDEN OBJECT DETECTORS; AND CONCRETE REINFORCING BAR LOCATORS