Product Number: Se-Y7 B Y D W Set of 4 Yellow, Blue, Black, White Notebooks expand your field. Notebooks are mini notebooks released in 1959 for surveyors. They are slim and compact, fitting perfectly in a workwear pocket, and feature a hard cover that allows for writing while standing outdoors. These features have been highly praised, making them a standard in the construction industry, and they have supported construction sites during Japan's period of rapid economic growth. Supported by professionals in the field for over 60 years, notebooks have expanded their use beyond surveying and construction to include fieldwork such as excavation and observation, mobile work outside the office, travel journals, and everyday notes, extending to personal life scenes. They are compact and suitable for carrying around, robust for outdoor writing, and feature an anonymous design that is not affected by the times. Such notebooks will expand your field, for work and hobbies.