Note: If you are doing a high volume of repairs, you can get 10-40% off these kits (and others) by purchasing in bulk.
These rings were designed to securely hold the home button in place when replacing the screen on an iPad 5 or 6.
To use them, remove a full circle from the sheet, apply it firmly to the home button area, and then push the center circle through the hole. This leaves a high-grade adhesive ring around the home button area, as shown in the photo. Remove the protective top layer of release paper from the ring when you are ready to attach the home button.
Each "kit" contains 10 rings, and each "pack" contains 10 kits, so 1 pack contains 100 iPad home button rings in total.