Use this easy to install high-visibility red handle blocking device with legend "Fire Alarm Circuit" for keeping an "original" I-T-E/Siemens 1 Pole Pushmatic circuit breaker locked in the "ON" or "OFF" position. Kit also includes one "Universal" blocking device for interchangeable design breakers with a hex key for tightening the set screw retainer. Complies with NFPA 72.2010 Sections 10.6.5.2.2 and 10.6.5.2.3 for Red marking and circuit identification. Adhesive backed legends include "Fire Alarm", "Emergency Communications" and combination "Fire Alarm/ECS" for panel door, dead-front and circuit directory. ELOCKFA / PHL1SIEMENS