Made from fat silver wire, it was hammered flat so it fits snugly into a book without hurting the binding. In typical AG Ambroult fashion, they were hammered and otherwise abused, then oxidized for a rustic feel.
The hook fits over the binding, keeping your place secure. Slip it in your book and pick right up where you left off.
There are many readers in my life, so it's good to know I have the gift of a bookmark ready and waiting for when an occasion arises.