This is a clip to secure the wound bobbin so it doesn't get tangled with the main thread. I wanted them to be colorful, but when I bought an assortment, the color distribution was so uneven that I ended up buying several. I have too many, so I'm offering them to anyone who wants to try them out or replenish their supply. 25 pieces in random assorted colors, the items in the photos are what will be sent. They will be put in a bag and lightly wrapped with bubble wrap for simple packaging and shipping.