These Needle organizer cards are our favorite way to ensure we always have the one we need. I dread the thought of getting a sick one caught and not having a clean needle, or worse, not having one at all. I still catch myself crying an extra in my hat band or in a pocket, but having the card on the outside of the doctoring bag lets me know at a glance that I have the needles I will need. It also is a great way to keep from having to dig around in the bottom of the bag for a new one amongst all the old ones. The card has a field of hook fastener on the back so it will attach to any loop field. For hard surfaces you can add some adhesive backed loop material and place the card for easy access. We have stuck them inside coat liners and pickup seat backs as well.