Features1Titanium Alloy: These bike derailleur screws adopt titanium alloy, which is corrosion resistant, rustproof and durable. 2High Reliability: With fine manufacturing process, the surface is finely polished to ensure the strength and improve the reliability of fastening. 3Light Weight: These front rear derailleur screws feature small size and light weight, DIY replacement part for bike. 4Easy Installation: These bike screws adopt small size design, convenient for you to install and disassemble, save time and effort for you. 55 Pieces: 5 pieces of bike derailleur screws (M4 3Pcs 13.5 2Pcs 20mm) are included in the package, meeting your different needs.SpecificationItem Type: Derailleur ScrewsMaterial: Titanium AlloyProduct Specifications: Front and RearDerailleur Limit Fine AdjustmentProduct Application: Front and RearDerailleur High and Low Limit Fine Adjustment ScrewPackage List5 xDerailleur Screws