The Dipsy Diver is the standard for the directional diving planer. The special round shape and resulting multi-directional feature set the Dipsy Diver apart from other divers and planers. This feature is made possible by the molded-in base plate weight that can be rotated in degrees. A shift right or left, as indicated on the base plate arrow, will cause the Dipsy to track to port or starboard.These are the Size 3 (or "003") size Dipsy, which is 4 7/8" in diameter. It can dive to 100 feet with the included O-ring attached.