Hunter x Hunter | Kurapika Finger Chains

Kurapika can conjure a unique weapon—five chains that extend from each finger on his right hand. Some of the fingers were specially designed to deal vengeance on the Phantom Troupe. To increase the effectiveness of his chains against them, Kurapika placed strict Limitations on the usage of his chains. Since the chains are materialized, their size and length can be controlled to a certain degree. He is able to conceal his chain through In in order to bind his opponent without their knowledge until it is too late. Kurapika is also proficient in other branches on Nen, such as Shu, which, combined with Emperor Time, gives his chains the ability to shatter rock, and Gyo.
(From Fandom Hunterpedia)