A socket for manipulating a conduit lock nut comprises a wall enclosing a circular area equal to an outer diameter of a lock nut terminates in a lip. A plurality of teeth spaced at a predetermined distance engage lugs of a lock nut. The teeth have sufficient height to engage the lugs when force is applied to the socket. A centering stem within the wall coacts with an inner wall of an electrical conduit opening to axially align the teeth with lugs of a lock nut about the opening. A tapered lead in provides spatial relief for initial engagement of the stem with an inner wall of an opening. A well between the stem and the teeth provide a recess for protruding walls of an electrical conduit opening to reside in during engagement of the teeth with lugs of a lock nut about the opening.