'Chain' in the Bible

This man lived among the tombs, nor could any one now secure him even with a chain;

And this woman, daughter of Abraham as she is, whom Satan had bound for no less than eighteen years, was she not to be loosed from this chain because it is the Sabbath day?"

For these reasons, then, I have invited you here, that I might see you and speak to you; for it is for the sake of Him who is the hope of Israel that this chain hangs upon me."

May the Lord show mercy to the household of Onesiphorus; for many a time he cheered me and he was not ashamed of my chain.

Then I saw an angel coming down from Heaven, having the key of the bottomless pit, and upon his arm he carried a great chain.