Lose an earring back? No problem we have extra earring backs here. Choose from screw-back threaded earring backs and push-back friction earring backs. All earring backs are sold individually. Please note threaded screw backs do not work on push-back non-threaded posts. Screw-back earring backs fit on threaded earring posts only. While friction push-backs work only on smooth non-threaded earring posts. Use the wrong back on an earring post and you will damage the post and the back. Threaded posts can become easily damaged if a screw-back earring back is pulled off of the threaded post. Always remove or affix a screw-back earring back by twisting left or right.