From the manufacturer:
Plan it out, sketch it up, and get creative with the Point Planner by American Crafts! It's the perfect customizable planner right in the palm of your hand. Add custom dates to your pages with this easy-to-use roller stamp. Customize the look of the stamps with your favorite colors of ink. This package contains one American Crafts Point Planner Roller Stamp with Numbers, Days, Months and Years.