Master Series Sterling Monarch 乳頭夾

Pulling the chain makes them bite progressively harder, just like described. They stay put firmly but aren't uncomfortable for me during shorter sessions. Give a nice sting without being too brutal.

The chain pulling mechanism is exactly as described—the grip really does intensify with each tug. The metal has a satisfying weight and the adjustment screw makes them easy to dial in.

The “get tighter as you pull” design works exactly as described, and the grip is firm enough to stay put even during a bit of movement. It’s a simple, well-made piece that feels substantial in the hand.