The rings close completely around the ankle or wrist and are secured with a small magnetic pin.
They are made from solid metal with welded joins and are nikel plated.
Material:Metal steel
Size:
Collar:
Male: 14cm inside diameter ;2cm depth
Female:12cm inside diameter ;2cm depth
Men handcuffs:
6cm inside diameter
2cm depth
Women handcuffs:
5.5cm inside diameter  
2cm depth
Men ankle cuffs:
8.5 inside diameter
2cm depth
Women ankle cuffs:
7cm inside diameter
2cm depth

Discreet packaging to protect your privacy.