We call it the RWO Swivel Base and Cam Cleat and RWO refers to it as its M8 Controline Jammer. Just think of a moon orbiting around a rotating planet and you can stop the motion at any time. This jammer has twin sheave leads that rotate 360ﾰ on top of a 360ﾰ-rotating ball bearing swivel base. Both cleats have fairleads. The R1968 uses a small Carbo Cam Cleat for lines up to 7/16 in (11mm) in diameter. It makes it easier to make trim adjustments from different angles and keeping the crew weight outboard.