* How do the European shanks compare to the American? In general they are slightly larger all around:
• European shanks are slightly larger at the leading end (approx 13.78mm vs. 13.4mm for the American).
• Euro shanks are slightly larger at the cup end (approx 15.8mm Euro vs. 15.38mm USA)
• European shank length is shorter at 41.7mm (US is 48.6mm).
• European shank has a slightly faster taper than US (approx 2.4/100 Euro vs 2.0/100 American).