Features: 1Steel Material: Made of high quality steel material with high strength and wear resistance, having a good performance for long service life. 2Main Function: Can play the role of deceleration and increase the engine torque force, improving the remote control vehicle and enhancing your using experience. 3Specially Designed: Designed for a more efficient deceleration power, which can be used to change speed for providing smoother ride, lower revs and higher torque. 4Working Performance: Manufactured with accurate shape and size, able to provide a balanced ride that maximizes the deceleration performance of the remote control vehicle. 5Easy to Use: Simple for installation and removal, can be used to replace the original old or damaged part for better performance and using experience. Package included: 1 x RC&nbspCenter&nbspSpool&nbspGear&nbspSet 2 x Washer