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See 14:49 - "on that Day thou wilt see all who were lost in sin (al-mujrimin) linked together in fetters" - and the corresponding note [64], which explains my above interpolation of the phrase, "of other sinners like him".
I.e., a chain exceedingly long - the number "seventy" being used here metonymically, as is often done in classical Arabic, in the sense of "very many" (Zamakhshari); hence "of a measure the length whereof is known only to God" (Tabari; also Al-Hasan, as quoted by Razi).
The sinful men who will be given their record on the Day of Judgment in their left hands will be in utter despair. Their power and authority which they misused to perpetrate injustice and oppression will be gone. The wealth that had made them turn a deaf ear to the call of Truth will be no more. They will cry out in agony: "O would that we were never raised again!. 0 would that death had obliterated us once for all". But their cries will be of no avail. They will be seized, bound in chains and drawn into the Blazing Fire for their crimes against Allah and man.