7mm Platinum Guardian La Pousette Locking Earring Back and Post with 1.05mm Hole. La pousette earring backs are great to add that extra bit of security to your stud earrings. The spring locking mechanism grabs onto the specialized notched post so you don't need to worry about losing your studs. Please keep in mind that the back and post only work together as a set, and cannot be used with normal friction or screw backings. These guardian backings need to be soldered your earring setting, so please purchase if you have a jeweler or are comfortable with soldering.