Bitch Binder(Des)

Bitch Binder: special item.

This collar makes its wearer the bitch of whoever put it on them, forcing them to serve them and fulfill any requests that are possible to fulfill.

The wearer cannot open the collar, even with the key.

Ownership cannot be transferred; to change the master, the collar has to be removed and put back on.

Durability: indestructible.

Reference
Acquired in Chapter 65 "Elementary, My Dear Newman"