The Greek word for "chains" is:
254. halusis, hal'-oo-sis; of uncert. der.; a fetter or manacle:--bonds, chain
This can mean a rope or anything that binds, not necessarily a metal chain. The word for "fetters" is:
3976. pede, ped'-ay; ultimately from G4228; a shackle for the feet:--fetter.
3.
|3739| who
|3588| the
|2731| home
|2192| had
|1722| among
|3588| the
|3419| tombs,
|2532| and
|3777| not
|0254| with chains
|3762| no one
|1410| was able
|0846| him
|1210| to bind,
4.
|1223| because
|0846| that he
|4178| often
|3976| with fetters
|2532| and
|0254| chains
|1210| had been bound,
|2532| and
|1288| had been
|5259| torn by
|0846| him
|3588| the
|0254| chains,
|2532| and
|3588| the
|3976| fetters
|4937| had been broken,
|2532| and
|3762| no one
|0846| him
|2480| was able
|1150| to subdue.
Strong's Number: 254
Transliterated: halusis
Phonetic: hal'-oo-sis
Text: of uncertain derivation; a fetter or manacle: --bonds, chain.
Strong's Number: 3976
Transliterated: pede
Phonetic: ped'-ay
Text: ultimately from 4228; a shackle for the feet: -- fetter.