manacle

shackle that consists of a metal loop that can be locked around the wrist; usually used in pairs

A handcuff; a shackle for the hand or wrist; -- usually in the plural.

confine or restrain with or as if with manacles or handcuffs

To put handcuffs or other fastening upon, for confining the hands; to shackle; to confine; to restrain from the use of the limbs or natural powers.