If he used the back of his hand, the chain would rotate with that as a
fulcrum and its tip should seize the knight's head, even if it lost a
little power. Hence, Eldrie's choice was the right one—but the
offensive power of a class 38 iron chain wasn't something a single
piece of thin leather could soak up.

“Gu......!”

A restrained moan escaped from the knight the moment he caught
the chain. My ears could clearly perceive the sound of several of the
bones in his left hand breaking all at once. He would not be able to
use that left hand for a while and neither would he throw the sacred
tool called «Frost Scale Whip» or something in his right hand onto
the ground.

(Alicization Turning, 284)