The clips are of very poor quality .They are dislocated from the first manipulation. They are manufactured in a very mmauvaise quality steel, which has no elasticity (indspensable quality for proper operation). What'd believe (although this is not indicated on the package) that the product is "made in China". If you have in your bags or drawers badge holders that no longer serve, with the pliers and the elastic 1.5 cm wide radius purchased haberdashery you can make the same "Fixationde cover" much stronger ( demonstrating that the tray products are better than industrial products).