Features1Alloy material: The pulley screws are carefully crafted from alloy, significantly reducing the weight compared to traditional materials. This helps to enhance the overall lightness and acceleration performance of the cycling, making the ride more nimble and agile. 2Accurate Flat Head Design: The flat head design ensures precise alignment with the derailleur, making it easy for quick installation and adjustments. It optimizes the shifting response speed, making gear changes smoother and more efficient during rides. 3Enhanced Chain Guiding Performance: The unique screw structure effectively enhances the pulley's ability to guide the chain, reducing chain skip issues. This ensures a stable transmission efficiency even in complex road conditions. 4Sturdy and Long Lasting: Alloy is resistant to oxidation, effectively resisting sweat and rain erosion. It is not easily rusted even with long term use, maintaining the aesthetic appeal and functionality of the pulley components, thus extending their lifespan. 5Accurate CNC Machining: Each screw undergoes precise CNC machining, with delicate edge processing and clear threading to ensure a great fit with the pulley. This enhances overall stability and riding experience.SpecificationItem Type: Alloy Rear Derailleur ScrewMaterial: AlloyPackage List2 x Chain Guide Wheel Screws1 x Sticker