First clip out of the bag broke instantly with little pressure. Very low qualitySuction cup is on, but clip is almost impossible to squeeze. And the clip part is metal, began rusting within the first day of using them.Great price, decent construction, has really good tension on the clip, but after only a few uses it has begun to show rust spots. For something advertised for use in aquariums, and mine is freshwater at that, it shouldn't be rusting so quickly, if at all.