watch open-end pins for watch bracelet ends stainless steel pins, this is a high  precision and standart professional watch Accessories., commonly used for many brand watches, "split pin/cotter pin"which connect the metal band flat-link in the middle.30 each of 18 cells,totally 540pcs,and it have 12 diffrent size , Wholly made of environmental stainless steel ,very high quality durable and antirust.