Loxx-Tenax fastener is a creative product which was invented early in 20th century in Germany and has been used in Europe since that time. To fasten, just press the button onto the stud with one hand. To release, simply pull it. Loxx - Tenax fastener withstands extreme forces and defies all kinds of weather. It’s made to be tear-proof, watertight, corrosion-resistant and, naturally, very long-lasting.Note: ORIGINALLY Marked with "GHE Tenax" and N0. 33 on locking washer. These marks have been dropped by the manufacturer. The top portion now is marked only Loxx with an Made in Germany on the locking washer.