Vicious ABS clamps

You can tighten these round black ABS nipple clamps from soft to quite vicious.

Their biggest advantage is that they can be adjusted with a knurled screw.

Inside there are teeth on one side, and on the other side a flat piece without a tooth.

As if the vicious teeth were not enough, there is also a ring on the clamps to possibly hang a rope, chain or weight.

Let the pleasure/pain begin.