ISO 5414-1根据ISO 3338-2规定了带有夹紧螺钉的工具夹头（端铣刀支架）的尺寸，该夹紧螺钉设计用于驱动扁平圆柱柄，并规定了使用的夹紧螺钉。它还提供了卡盘前端的最大直径。 ISO 5414-1定义了两种类型的驱动器: 孔等于或小于20 mm的卡盘，用于驱动带有单平面的圆柱形柄刀具，这些刀具配有单切割或双切割部件；孔等于或大于25 mm的卡盘，用于驱动带双平面的圆柱柄刀具，这些刀具仅配备一个切削零件。

ISO 5414-1 lays down the dimensions of tool chucks (end mill holders) with clamp screws designed for driving flatted cylindrical shanks in accordance with ISO 3338-2 and specifies the clamp screws used. It also gives the maximum diameter of the chuck nose. ISO 5414-1 defines two types of drive: chucks with bores equal to or less than 20 mm intended for driving cylindrical shank tools with a single flat, these tools being provided with either a single or a double cutting part; chucks with bores equal to or more than 25 mm intended for driving cylindrical shank tools with a double flat, these tools being provided with a single cutting part only.