The Moyes Lures Medium J-Boy is a highly versatile plunger style head that works for all kinds of big game species but is a particularly killer Ahi and Marlin bait. Double tapered head with 12" sized skirt saddles. Fantastic medium sized head that is an absolutely proven fish killer. Keel weighted for perfect balancing to keep the lure from rolling. One of Andy's most popular models for a reason.