Product review (1 stars): Do not work
these are manufactured incorrectly. They will not turn enough to lock in and letter water flow. Lets see if I can return them after they sat in my closet for 6 months.

UPDATE:  Received a second replacement set. These all leaked; the center holes were too big causing the o-rings to have nothing to seat against.

To the sellers credit, they replied to my email on a Sunday and gave me a refund without any question.

Bad product, great seller with great customer service.