As described in the image. We plan to add more items for expanding spring snap fasteners in the future. Reference: While attaching a pen, if you sandwich paper with 3mm holes spaced 50mm apart, it becomes a simple memo. For the spaced holes: Press the paper against the spring snap fastener and make 3mm holes where the marks appear; it's quick and easy. The notebook is sold separately and is a quarterly plus one monthly block style, with the second half consisting of memos. Also, it is available for free in limited quantities at Hot Cafe Kozukue, near Kozukue Station in Yokohama, open weekdays from 11:00 AM to 3:00 PM. Color: Cream - Material: Leather - Features: Snap button closure, card pocket - Size: Compact Thank you for viewing.