This multifunctional bookmark easily attaches to the inside of any classic-style Hobonichi Cover with pen holders. As you turn pages, the Page Keeper flips and stays on the last page with a rubber band. Available in two sizes for A5 Cousin, Weeks and A6 Planner/Original, the Page Keeper can be placed in the bottom right corner pocket of the interior and secured with a rubber band. For the Weeks, it can be placed on the bottom right corner pocket of the Clear Cover interior (sold separately). With its dual purpose of keeping your place and keeping your book shut in your bag, the Page Keeper is a handy addition.