This is the most common type of earring back offered in the jewelry industry, requiring no screwing to put on or take off the earring. Also called a butterfly back, it can be used with any style of earring, whether it is a stud, hoop or drop.
Push on/Screw off
Push on/screw off earrings are a little quicker to put on than screw on/screw off styles. The wearer can push on the earring back, and then unscrew it to take off the earring. Push on/screw off posts are typically used with studs and drop earrings.
Lever Backs also have a curved wire hook but are latched behind the ear with a lever that opens and closes. These are only used with drop earrings.
Only used with drop earring, this style has no back to it.
It is a curved wire hook that the earring itself can be attached to.
Used mainly for hoops, there are two styles of latch backs: one has the post on a hinge and clips into a notch on the back of the earring. The second has an immobile post and a lever-style back that has a hole for the post to slide in to.
Screw on/Screw off
Screw on/screw off fasteners require the wearer to screw the back of the earring onto and off of a post threaded through the ear. This is an older style fastener, which has been replaced by the push on/screw off style, but is available upon request for added security or to repair an older earring with this post type.