This punch allows the punch leaves Filofax for all formats (except A4) with its mechanism of two groups of three punches whose central interval is adjustable. Depending on the setting, you can punch its leaves for an A5 organizer, Personal or Pocket (Mini omitting the 6th hole). The holes are 5.5 mm in diameter and are positioned at 4 mm from the edge of the sheet, ideal distance to avoid overloading the rings center. Finally, we can simultaneously perforate 6 leaves 80 grams, 8 sheets of 64 grams. This punch has become indispensable to me to spend a Filofax format to another in a jiffy and without the fuss! Last detail: the seller is in Japan, so you have to wait a bit for the reception. Amazon had told me a receipt within 2 to 4 weeks but I was pleasantly surprised to receive it in 12 days :)