Handcuffs: - These metal bondage items, familiar from police use, are another one of those well-known SM icons that have real practical drawbacks: they can be painful and damaging to nerves and bones, and like all metal bondage items should be used with great care. Two popular types are the U-shapes with a cross-piece and the ratchet type. Straight 8s have both cuffs as one solid piece rather than joined with a chain, thumb cuffs are usually mini straight 8s and ankle cuffs are larger and with a longer chain.
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