expander Key-Dental Orthodontic Expansion Swivel Key Tool for Palatal Expanders.

Saved me a trip to the dentist! And we tried with a paper clip but this is completely necessary

We've tried a couple different swiveling key tools for expanders. This one is similar to others we've tried in that it 'swivels' as the name suggests. The handle shape is actually really nice because it pans out like a utensil, making it easy to both hold and orient how you want it in your hand.

This is exactly what it says it is! Not sure what more to say about that :) I suppose, ergonomically speaking, it's a very tiny handle.