They are like the E-S-P ones.
Your hooklink can come off them due to their shape, check them constantly as they work like a key ring but with a "leg" the leg makes them easier to let a hooklink come off
i never lost a fish on them, but when i have caught on them in the past, during the fight the hooklink has worked its way around the clip- almost coming off
each to there own, if im fishing and i dont want a hinge/pivot, i will use them and cover it with silicon completely but i tend not to use them atall now