Your package should include a MagLock Ring with embedded magnets and a Round adapter.

Both in the size you purchased... either 2.5" or 4".

MagLock Rings are held in place by super glue. We've done tons of testing and this seems to be the simplest solution.

Apply a generous amount of superglue onto the inside of the MagLock Ring.

Slide the ring onto the round adapter.

Allow the glue to fully dry before using.