Park tool head wrench 30 32mm hcw7our popular and versatile head wrenches feature the park tool proven y head design and all headset wrench openings are lazer cut to ensure a tight accurate fit precise sizing is achieved by high voltage computer controlled lazer technology after heat treat waiting until the wrench is heat treated eliminates shrinkage and expansion of the steel after the wrench is sized it takes longer and costs more but its worth the extra effort features30mm and 32mm h