Aliasing shackle → shackles
Link to alias
Reason:
It is simply the singular form of shackles.
In "cuffs_(disambiguation)" shackles and handcuffs are plural and shackles is also used more frequently so I chose to alias it to shackles.
EDIT: The tag alias shackle -> shackles (forum #282267) has been approved by @Millcore.
Updated by auto moderator