First, I was very pleased with the bed bases. Up to the night in which the first hinge of the head part aushakte to three clock in the morning! So I thought nothing there and guessed my part an error During installation. But unfortunately repeated this at different times of night! Now I'm trying for a week least gesendedet new hinges to get so far without success. The first time you call me just told I should try it once by e-mail with the success that I have the error described three times and apparently I have not understood. Let's see how long that will ever happen! It was not for long! The next mail came from Mr. Fischer of informing me that the hinges by post are! Incorporating I had indeed even accept but I hope now everything is OK! Nothing is OK! The 4 delivered distinctive hinges refused all their service! In other reviews, the problem has also been described on several occasions! But you can not read it all, yes! Now the grid also begins to creak yet! My resumé, never a slatted frame of FMP! I have built my hinges of an old slatted frame from the attic! Everything OK! In comparison there is already the Blosen watching to see what the hinges sick; CHEAP SCRAP!