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Good thing I ordered the large size for my bigger toys, because the smaller one would've been a total waste. The grip is rock solid on tile and glass, hasn't let a single heavy dildo slip during a session.

The small one fits my medium dildos perfectly, and the large one grips the heavy ones without sliding off the wall. I've even used them with my fuck machine attachment and they've held steady through an entire session. No complaints at all.

The suction cup holds my bigger toys firmly on the tile floor, and the large size fits them without any wobble. I’ve used it with a few different ones and it’s never slipped, even during the rougher sessions.