Patrick Johnson said:My 10mm tip hits stiff with a conical taper. I think an 11mm tip could use a semi-pro taper (increases in diameter, but not conical) and still hit fairly stiff. I doubt that the Predator 11mm (is that the Z shaft?) has a conical taper.
pj
chgo
The Predator 314 is 12.75 with a pro taper; the Z shaft is 11.75 mm and has a conical taper.