This season's dungeon wear, the irons that every fashionable slave / convict will be wearing. 

Neck clamp or shackle and two chains also known as neck irons. Neck requires a seperate lock to seal. Chains can go around wrists with additional locks or they can be connected to the next slave / convict who is also wearing a neck shackle.

Devices like these have been used throughout the ages and are an integral part of a dungeons or law enforcers armaments.

Size:
chain length 550mm
cuff 150mm diameter
cuff height 30mm
Weight: 1.07kg