The Eyepiece Leveler Bracket Base for O'Connor Pan and Tilt Heads mounts on to O'Connor pan and tilt tripod heads and allows for the attachment of eyepiece levelers, such as the Eyepiece Leveler Telescoping Arm. The eyepiece leveler bracket is attached to a tripod via (2) two #10-24 x 1/2in screws and is adjustable in two directions.