I needed pipe clamps for a "normal" purpose and figured, that they can be useful in bondage and even selfbondage.
http://www.nussbaum.ch/de/r/rohrbefestig...00198.html
Sizes range from very small to 120 mm where I got them. Around 60 mm fits well around my wrists, a little larger around my ankles. I could even fit the 120mm around my neck, but I will be very careful with that.
As you can see, the clamp has one screw to close it and another one to attach it to something. That second screw can be replaced by a normal screw, usually M8 or M10. If you fit two of these clamps to a rod, you can tie someone's hands or legs. You could even attach the rod to the wall or whatever.
And now the best: It can be used in self-bondage too! I used an aluminium rod with one hole near each end. I used 60 mm screws to attach the clamps, but added a nut to the side of the screw that is opposite the clamp it holds. Once the screw is in completely, there is still space to move the clamp back and forth. In order to stop that, I only had to tighten the nuts. I tried to handle the nuts and screws from the hand trapped in the secured clamp, it is not possible. However, with a wrench, it is fairly easy. The biggest challenge is to get the screw into the nut of the clamp, when the hand is in the clamp a
eady. I had to rest the screw head against a wall and rotate my wrist in order to "grab" half a round of the thread. From there, it is fairly easy. Use the wrench to screw in the screw (hex-head of course), then tighten the nut. Drop the wrench and you can't escape.
The prices are in the range of a few euros, less than 10 euros for screws, bolts, an aluminium rod and two clamps. Of course you could add clamps for the ankles to make it a bigger challenge.
Photos to follow.
http://www.nussbaum.ch/de/r/rohrbefestig...00198.html
Sizes range from very small to 120 mm where I got them. Around 60 mm fits well around my wrists, a little larger around my ankles. I could even fit the 120mm around my neck, but I will be very careful with that.
As you can see, the clamp has one screw to close it and another one to attach it to something. That second screw can be replaced by a normal screw, usually M8 or M10. If you fit two of these clamps to a rod, you can tie someone's hands or legs. You could even attach the rod to the wall or whatever.
And now the best: It can be used in self-bondage too! I used an aluminium rod with one hole near each end. I used 60 mm screws to attach the clamps, but added a nut to the side of the screw that is opposite the clamp it holds. Once the screw is in completely, there is still space to move the clamp back and forth. In order to stop that, I only had to tighten the nuts. I tried to handle the nuts and screws from the hand trapped in the secured clamp, it is not possible. However, with a wrench, it is fairly easy. The biggest challenge is to get the screw into the nut of the clamp, when the hand is in the clamp a

The prices are in the range of a few euros, less than 10 euros for screws, bolts, an aluminium rod and two clamps. Of course you could add clamps for the ankles to make it a bigger challenge.
Photos to follow.