Features: The chain sprocket clutch delivers 30% higher transmission efficiency through precise engineered gear tooth alignment, optimizing power transfer for demanding applications. Builts with high strength materials, this clutch demonstrates longer life than standard steel models while resisting wear during intense operation cycles. Professional cyclists and frequent commuters benefits from its 30 second installation system and universal 16"-28" wheel compatibility. Ideal for mountain trails, or high load landscaping tasks where vibration resistance and anti loosening mechanisms ensuring reliability. Its double lock design maintains operational stability across extreme terrains, seamlessly adapting to chain saw and various cycling equipment configurations. Specifications: Component:Metal For HU340、345、350、445、450 Technical parameters: Precise toothed design to ensures transmission efficiency and stability Use scenarios: widely used in clutch systems for motorcycles, ATVs, karts and other vehicles Package Includes: 1 Set Sprocket Clutch Disc note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you donot mind befores you order. 2.Due to the differences between different monitors, the picture may not reflect the actual color. Thanks for your understandings.