Handcuffs with hoop. The handcuffs are secure and offer a freedom of movement for your bottom.
At the edges of the two cuffs there is a small bolt that can be pushed with the key's pin to activate the handcuffs' doublelock. This prevents the cuff from closing any further, even if you press your bottom against the mattress with the cuffs on his back.
Because the joint is very flexible, the hands can turn against each other. So, with simple means you have a comfortable, yet effective steel bondage.
