Boyd’s Bible Dictionary:
(shackles). Instruments of brass or iron for fastening feet of prisoners (Psa. 105:18; 149:8).
Concise Bible Dictionary:
Shackles – (from sometime before 1860)
Shackles for the feet. It is said of Joseph that his feet were hurt with fetters (Psa. 105:18). They are spoken of as being made of brass and of iron (Judg. 16:21; 2 Sam. 3:34; 2 Kings 25:7; Job 36:8; Psalm 149:8; Mark 5:4; Luke 8:29).
Shackles – (from sometime before 1860)
Strong’s Dictionary of Greek Words:
Meaning:
ultimately from 4228; a shackle for the feet