New item 01/08/17! Retaining ring for all tractors which have the front wheels retained by a snap ring. Also used to retain the front spindles on all models except the 400/4000 and 600/6000/7000 series. This snap ring is for a 3/4" shaft and is thicker than a standard snap ring, approximately .075". Always install snap rings with the sharp side out (in the thrust direction) for maximum retention.