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I have one of these for the same type of play and it's fantastic. When it's tightened just right wiggling just gives you the risk of an even more intense angle with the wand, legs closed and bound is brutal.
Or you can get something like this which should do the same thing. I dont own one since rope, but looks useful! https://www.amazon.com/Strict-Leather-Forced-Orgasm-Belt/dp/B007FY06A8
Ok, but only since you asked: https://www.amazon.co.uk/dp/B007FY06A8/
Note: I removed your affiliate link info.
Really? I had one girlfriend who HATED hers - was not strong enough, was just awkward to hold something that huge.
For the belts I've seen, it seems they all take Hitachi-like "wands."
Is there an alternative to this belt-and-wand system?
Is there an alternative to a Hitachi wand?
We were considering this: