A specific post back, screw-backs are the safer option as the butterfly has to be screwed around the post. These screw-backs can be placed on any earring, and we especially recommend them for higher value earrings. A bit tricky to use at first, especially if you are not used to taking them in and out, but it is definitely worth it. This method of fixing your earring is by far the most secure. The post and the butterfly are in the same metal as the rest of the earring.