Park Tool HCW-7 Head Crank Wrench 30 mm 32 mm
30mm and 32mm head wrench. The HCW-7 Head Wrench features our 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. The HCW-7 weighs 8.9 ounces. It takes longer, and costs more, but it's worth the extra effort.