Sometimes we call this an iron hand or even an iron fist.

有时我们称之为铁手，甚至是铁腕。

Such a splendid fellow, with an iron hand, just what an administrator ought to be.

这么牛逼的家伙， 铁腕的一手， 不愧是当官的。

Think of the attributes often celebrated in supposedly great leaders, an iron hand, restlessness or ruthlessness, a killer instinct.

想一想那些被认为是伟大领袖的特质，如铁腕、不安或冷酷、杀手本能。