What are screw-back earrings, and who should choose them?

Screw backs hold the post with a threaded disc, which grips more securely than a push-back. They suit valuable studs, active wearers and anyone who has lost earrings before.

How they work

Our advice The post has a thread and the back screws onto it. Because the back is fixed by threads, it is harder to knock off than a friction push-back.

Who should choose them

• Stud owners with valuable stones: extra security reduces the risk of loss.
• Active wearers: movement can loosen push-backs.
• Children and gift buyers: a secure back helps keep a small earring on.
• People who lose earrings: a threaded back gives peace of mind.

What to check

1. The fit of the thread, which should turn smoothly and stop firmly.
2. The size of the back, which should be comfortable.
3. Whether replacement backs are available.

It depends A screw back is not always better. It takes slightly longer to fasten and can be fiddly for some people, particularly with small hands or reduced dexterity.

Care

Our advice Unscrew the back occasionally to clean the post and the thread, and check that the thread is still firm. Over-tightening can damage the thread.

Comparing

• Push-back: quick and easy, may loosen over time
• Screw-back: secure, a little slower to fit
• Flat-back: low profile and comfortable for sleeping

Fact GIA's care guide says a diamond that is loose in its setting can wear through a prong over time.

Our advice Have prongs and settings checked by a jeweller from time to time, a good habit for studs that carry stones.

Choosing

• Prefer screw backs for studs you cannot afford to lose
• Keep spare backs

Good habits

Our advice Check screw backs every few weeks, especially after exercise or travel. If the back is loose, tighten it gently. Keep a spare pair of backs at home, since a lost back is a common reason for abandoning a good pair of studs.

Uncertain We cannot say how secure any back will be after long wear. Check it regularly.

Related reading: How do I choose a bracelet length if I wear a watch? · Diamond Earrings for Sensitive Ears: Metal and Back Choices

Sources

• GIA, Diamond care and cleaning

Fact = stated by the cited source. Our advice = editorial recommendation. Uncertain / it depends = limits of what can be said in general.