One side of my new 5711 bracelet clasp (the 12 o'clock side) is extremely hard to remove. I have to literally hold down the end tight and pull very hard for the clasp to come out. I do this as gently as I can to reduce as much stress on the bracelet as possible. But it's still a very hard pull indeed. The 6 o'clock side (with the fold over safety clasp) is a lot easier to remove, but still secure.