Patent ID: 7434327

Claim:
An apparatus for locating a perimeter of a body having a socket with respect to an outer surface of a sheet of material wherein the body is rigidly positioned behind the sheet of material, comprising: a first tubular hollow shaft connectable to the socket at a first end and open at an opposing end, said first tubular shaft having an interior surface with a smooth portion adjacent to the first end and a splined portion commencing at the open opposing end and terminating at the smooth portion; a second tubular shaft having a first end with a smooth outer axial edge, a second opposing end and a splined exterior surface extending between the smooth outer axial edge and the second end, the second tubular shaft configured for disposition in the first tubular hollow shaft and movable relative to the first hollow shaft; a first magnet connected to the second end of toe second shaft; and a second magnet of opposite polarity positionable on an outer surface of the sheet of material adjacent the body.