I got a package of counterfeit wonder clips from amazon that were marketed as clover wonder clips (third party seller, fullfilled by amazon). The quality difference was very evident. They didn't have the same spring. It was too tight. A couple broke right away. They had sharp spots where the plastic wasn't cut correctly. This would catch on the fabric. The color was off. I returned them. I am leary to buy the off brands because of this experience.