Easy to attach with string. Sold in packs of 5. We have a large number of fasteners for sale. Discounts are available for bulk purchases, so please consider. a-15 ※Due to difficulties in adjusting the lighting during photography, the color of the actual product delivered may differ from the photos depending on the viewing environment and monitor resolution. There may be minor scratches or imperfections from the manufacturing process. Please be aware of this beforehand.