Extremely poor design. I've only been able to hand tightened the faucet to the sink, and it eventually works loose as you turn the faucet. The adapter that connects the faucet to the feed lines from the handles is at such an angle and close to the handles the short feed lines kink and cut off the water supply. As the faucet is turned between the sinks, it continually loosens, and the adapter turns, and water is cut off. Will be replacing with an better quality brand.