Feature:1. [Rugged and Durable] Made of steel material, strength and durability, to ensure the safety of your watch and long service life.2. [Diverse Sizes] Diversified sizes, can be replaced at will, to meet your daily needs.3. [Numerous Quantity] Numerous quantities make the fault tolerance rate higher, so you don't have to worry about one or two lost troubles.4. [Simple to Use] The shoulders at each end allow easy grasping of insertion and removal with spring bar tool, easy to install and use.5. [Applicable] Professional tools for watchmakers and watch repairers, saving you expensive repair costs.Specification:Item Type: Spring BarMaterial: SteelSize: 1.3x10mm, 1.3x11mm, 1.3x12mm, 1.3x13mm, 1.3x14mm, 1.3x15mm, 1.3x16mm, 1.3x17mm, 1.3x18mm, 1.3x19mm, 1.3x20mm, 1.3x21mm, 1.3x22mm, 1.3x23mm, 1.3x24mm, 1.3x25mm, 1.3x26mm, 20 Pieces for Each SizePurpose: Connect the Needle Between the Strap and the Dial, with Multiple Sizes, Convenient for Your Choice Package List:340 x Spring Bar