1[Stainless Steel] Made of high quality stainless steel, strength and durability, to ensure that your watch is safe and can be used for a long time. 2[Easy to Use] The shoulders on each end allow easy grasping of insertion and removal with spring rod tool, easy to install and use. 3[Various Sizes] Diversified sizes to meet your needs for different sizes, and can be replaced at will. 4[Large Quantities] Numerous quantities make the fault tolerance rate higher, so you dont have to worry about one or two lost troubles. 5[Applicable] Professional tools for watchmakers and watch repairers, saving you expensive repair costs.