Title: Doesn't work on thick mattresses
Product review: This rail is a pain in the neck to lock in place, once it's there it stays put but we bought it with the idea of being able to change the sheets easily by dropping the side. Big mistake, once it's off it takes all of my husbands strength to put it back on again. We have a reasonably thick mattress, say 10 inches, so if you have something thinner than this you might consider it, otherwise don't bother. We're taking it back...
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