Provides additional parking braking force when parking or starting on a steep slope. For CBR400R For CBR500R For CB300F CBR 400R 500R CB 300F. Improve the reliability and fault tolerance of the overall braking system. Improve braking efficiency: It can trigger or distribute braking force between the front and rear brakes simultaneously. Surface treatment can improve hardness,stable performance,anti-rust,durable,light weight., Manufacturer: MOMOHCHGBT