Adjust to breaker with simple thumb turn and then close clamping handle for a tight grip on the toggle,and the locking operation can be easily completed without a screwdriver,breaker lock can isolates hazardous energy and prevents unauthorized access. Fits standard height and tie-bar toggles typically found on 120 and 240 volt breakers,suitable for single and double toggles. The circuit breaker locks are suitable for industrial,electric power,chemical,automobile,,household,coal mine and places. It can also be used to lock out a breaker from a neighbor stealing power. The Nylon body and non-conductive plastic shackles of the SafeKey Padlock are and , can be used in electrical isolation situations to prevent , the strength and not easy to deform and break., Manufacturer: Duanthry