- Circuit Breaker Locking Device – Tie Bar for Multi Pole MCB’s. Color: Red. DESCRIPTION: ● Nylon construction, Temp -20 upto 120 Deg. C ● Metal tongue sits in the toggle of the breaker and acts as a barrier disallowing breaker to be operated. ● No tools required for installation. ● Works on single and multipole miniature breakers. Weight: 0.020 Kg. (20 gms)