Franklin's M210 stud sensor makes hanging pictures a cinch. Simply press the button and the unit's 13 sensors instantly locate stud edges and centres on the wide display, showing you where to safely drill. No calibration is required, just press and go. The live wire meter identifies electrical fields to avoid mishaps while you mark your holes. Easy to operate, the M210 detects both metal and wood studs to a depth of 4.3 cm, ensuring your images stay perfectly level for years.