1.Various applications: Bicycle chain holder, suitable for road bikes and various chainring configurations, effectively prevents the chain from falling off the frame and ensures strong adaptability with four different lengths of stainless steel screws included in the scope of delivery 2.Easy to install: Chain stabilizer made of aluminum alloy with screws. Easy to install at the front end of the drivetrain – no professional experience or complex tools required, making it very convenient and practical for everyday use 3.Improved chain stability: Chain stabilizer made of aluminum alloy with screws. Specially designed to keep the chain intact and effectively guide it to ensure optimal and performance on road bikes 4.Longterm use: Chain protection for most bicycles. Made of highquality aluminum alloy, rustproof and durable to ensure it remains undamaged and functional for extended use, not prone to decay