Most of our irons are universal hosels. The exceptions are the Max Wedges (.370″), the new M980 irons (.370″), and the STi2 irons (.370″). They ae all just .370″ parallel tip hosels. .355″ taper tip shafts can still be used in those as well, they just don’t have the .355″ bore adaption in the bottom of the .370″ parallel bore like the Universal hosels do. You could just use a shim if you wanted to put a .355″ taper tip shaft in one of those three models.
Britt Lindsey