The pull-pin needle makes it easy to thread a needle. All you have to do is to pull the thread into the slot over the eye of the needle. The slot is in the shape of a V to make it easier to locate. There is another V shape underneath the slot to prevent the thread from slipping out. This needle is very easy and convenient to use for anyone who has difficulties in threading a conventional needle because of poor vision or poor fine-motor skills due to arthritis or other illnesses.