The Zoo Hardware Vier V5 is a 5 pin euro cylinder this particular one being a half/single euro that we would use for some garage doors in the UK. This one available from intolocks.co.uk is a good training lock because the pins can be removed easily by removing the grub screws (please ask for this model if purchasing one as they can come already pinned up without the grub screws) This particular one has 3 spool pins with two normal pins.