Punch for double ring notebook pitch and twist ring notebook. New tabletop type! *International standard 1/3 inch (8.47mm) pitch round hole *Maximum number of punched pages: 5 sheets of copy paper (64g/m2) (JIS standard pitch A4 - 30 holes, B5 - 26 holes, A5 - 20 holes are not supported.) Power up your Twisting Notebook. Various documents such as data, memos, timetables, maps, etc. can be punched with this punch and bound in the Twist Ring Notebook. The Twist Ring Notebook can be easily inserted, removed, and replaced, making it your own personal smart notebook.