I bought this socket for my granite countertop. The first one I bought rubbed the lid and didn't fit properly in the service box. After repeated opening and closing, the spring has shifted and broken. I sent it back for a new one and this time made sure it moved freely and then secured the screws with Loctite. We found that the key to close this exit ONLY pushed the center, not left or right. Make sure the vessel is securely attached to the granite and will not move. Now it works great!