Chrome Vanadium   70060 (150mm / 6") Head opens up to 21mm. 70061 (200mm / 8") Head opens up to 27mm. 70062 (250mm / 10") Head opens up to 30mm. 70063 (300mm / 12") Head opens up to 36mm. 70064 (375mm / 15") Head opens up to 46mm. 70065 (450mm / 18") Head opens...