One look and they ran !!! . To isolate for the main 60 amp DP incomer switch I had ready etc to attach the new meter to etc .We went with the building manager to isolate and found this .... Now Ive never seen one .But I do know thy can have a history of not going back on due to the pins moving etc once turned off ?? Also they cannot find the "pin" that should be inserted in order to lift handle and "pull " the breaker " Guess a screw driver could be used ! But as this covers 4 apartments and whilst we can give legal notice to turn off... Some flats are not occupied 24/7 so would not have a clue if any issues .And prefer to turn off most things in order to reduce the instant load . ANYONE touched these monsters before ???????