Metal bondage
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Metal bondage (or device bondage) is bondage involving the use of metal apparatuses to restrain a submissive as part of BDSM activities. Other than the use of rope to secure a body, metal bondage normally requires careful preparation, since more extravagant devices have either to be built or bought from a specialist. The range of devices can vary significantly, from simple handcuffs or chains to specially designed chairs or complex bar linkages.