When I received the clip, I glimpse me that the clip does not block the opening, normal or defective product? Then clamp the folded on itself I found there was the game, roughly speaking I was disappointed. So I contact the seller to return the product, sent me a shipping label, to the Post, surprise, I have paid the shipping cost almost 7 euros. So I send the product, the seller contacted me and offered me 10 euros I send an email asking for an arrangement. And they made me a transfer without any explanation, they call me and say they refuse to refund me the entire clip because the product packaging has been opened. Impossible to find a way of understanding, I called SUPER AMAZON, counselor answer me a minute, and plead my problem while reassuring me. And reimburse me the difference in the hour. Beware of this clamp and the seller thank you and the seller Amazon monitor and protect your customers! `