Operation of Klein Job Box with American A50 Lock. Note that the lock assembly (with the bracket installed on the lock) needs to be inserted from inside the box.
A50: http://www.americanlock.com/solid_body_padlocks/solid_steel/non_rekeyable_padlocks.jsp
A6260: http://www.americanlock.com/solid_body_padlocks/solid_steel/rectangular_padlocks.jsp