This Review Title is No matter what I tried, these would not curve! and the content is: I don't understand these at all. I read the instructions, watched the video, asked for help - but nothing I did could make these things "snap" into a circle, let alone fasten in any way. Returned for refund..There are other information for this review, one is This reviewer did purchase it and the other is 0 people think this review is helpful.