Chain ring: high strength aviation aluminum alloyCrank: high strength aluminum alloy Chain Cover: aviation aluminum alloy The chainring and aluminum chaincover are secured to the crank arm's pawl with screws and nuts, allowing for disassembly Chainring: This chainring is made using a combination of stamping, heat treatment, and CNC machining. The surface is treated with a sandblasted anodized finish for enhanced durability, Crank Arm: The crank arms are produced through precision forging, heat treatment, and CNC machining. They feature a sandblasted anodized finish, ensuring both strength and resistance to wear. chain Cover: The chain cover are produced through precision forging, heat treatment, and CNC machining. They feature a sandblasted anodized finish, ensuring both strength and resistance to wear. This combination of processes guarantees a lightweight yet robust design, perfect for high-performance cycling.