簡易乳頭夾附鏈條 by Mr B

The width of the clamp distributes pressure evenly, which makes them feel surprisingly comfortable for extended wear. I've tested them during a short session and they stay put without slipping.

The wide clamping surface spreads the pressure evenly, so it’s a sharp pinch rather than a piercing bite. Slipping them on takes two seconds thanks to the simple squeeze-open design, and the chain adds just enough weight to remind you they’re there.

I was a bit worried they'd be too tight, but the broad clamp surface distributes the pressure surprisingly evenly. The chain has a nice weight to it, and adjusting them on the nipple is quick once you get the hang of the squeeze mechanism.