This part of ISO 10145 specifies the general dimensions of end mills with brazed helical hardmetal tips, with 7/24 taper shank. Two types of end mills with 7/24 taper shank are specified: — end mills with 7/24 taper shank for manual changing, in accordance with ISO 297; — end mills with 7/24 taper shank for automatic tool changers, in accordance with ISO 7388-1. This part of ISO 10145 applies to right-hand and left-hand end mills, irrespective of helix angle and number of flutes.