This is a hand-stitched, genuine leather notebook cover for a surveying notebook (Yacho) size. It can hold one Yacho notebook. It has a pen lock-style pen holder that prevents the cover from opening when a pen is inserted. The pen lock section has been made wider to accommodate multi-function pens. In the photo, a Jetstream 4&1 is inserted. The exterior is made of brown vegetable-tanned leather, the interior is black vegetable-tanned leather from Tochigi Leather, and yellow polyester thread is used for the stitching. The edges have been burnished with Tokonole and the entire cover has been finished with Lanolin. Because it has been finished with Lanolin, it should repel water to some extent, but it is not very water-resistant, so please be careful when using it outdoors. The surveying notebook and pen in the photo are not included. *This item is also listed on other sites. If it sells quickly on another site, we will cancel the order. Thank you for your understanding.