: Because they are rigid and can be heavy, it is vital to monitor the wearer for numbness, tingling, or skin irritation.

: They are easily recognized by their "pancake" or "D" shape and heavy-duty steel construction, often polished to a mirror finish. Use in Bondage

: Once locked, they remain rigid, offering a high level of security that is difficult to manipulate without the specific threaded key.

: Ensure there is enough space (typically one finger's width) between the metal and the wrist to prevent nerve compression. Bondage Darby Style Handcuffs - High Quality SM Restraints

In the world of BDSM and heavy restraints, "Darby" refers to a classic style of adjustable, high-security handcuffs known for their vintage look and extreme durability. The History of Darby Restraints