For some time Valentine had been wearing a shin guard, which he would rotate (so it covered his calf, not his shin) in order to increase the pressure exerted by the Figure Four Leglock. He referred to the shin guard as the "Heartbreaker". Valentine would also (illegally) attach the shin guard to his arm in order to accentuate his elbow drops. In the course of the feud, Garvin countered with a rotated shin guard of his own, which he dubbed "the Screwdriver Diver". The feud culminated in a submission match at the 1990 Royal Rumble. Garvin utilized the "Hammer Jammer" during the match, using it to "counter" Valentine's figure-four leglock when Valentine applied it on Garvin during the match (rather than writhing in pain as normal during the hold, Garvin was smiling and making faces at Valentine). Jimmy Hart managed to remove the "Hammer Jammer" from Garvin's leg, after which Valentine systematically wore down Garvin's leg, but eventually lost after Garvin hit him with the Heartbreaker and applied a sharpshooter, forcing Valentine to submit.