ISO 10145-1:2016 specifies the general dimensions of end mills with brazed helical hardmetal tips, with parallel shank.

The following two types of end mills with parallel shank are specified:

- end mills with plain parallel shank;

- end mills with flatted parallel shank.

ISO 10145-1:2016 applies to right-hand and left-hand end mills, irrespective of the helix angle and number of flutes.