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The vacuum-lock system clicks in place almost instantly with the Keon adapter, so there’s no fumbling mid-session. It also works fine standalone, which gives me two solid options depending on my mood.

I was a little skeptical about how secure the vacuum-lock would be, but it clicks into the Keon adapter firmly and hasn't budged once during use. The silicone texture feels smooth and comfortable, making solo play much more enjoyable.

The vacuum-lock attachment clicked right into my Keon adapter without any fuss, and the silicone is firm but has enough give to be comfortable. It stays put during use, which is a welcome change from other toys I've tried.