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I’ve been using it for a few days and the smooth stainless steel surface makes insertion really easy. The expansion mechanism locks in place firmly once you turn the key, which gives me total confidence during wear.

The locking mechanism works exactly as described—once it expands inside, it's not going anywhere. The stainless steel feels solid and heavy, which adds a nice sense of permanence during use. A bit of extra lube helped the initial insertion go smoothly, but after that, it stays put perfectly.

Pushing it in was a snug fit, but once inserted, turning the expansion knob gave a satisfying stretch that stayed secure. I've never had a plug that locks in place so confidently—it felt both heavy and precise. The stainless steel slid in smoothly with a little lube.