Packing Includes: 3x Specially Designed Clutch Spring, 3x Rubber Caps, 3x Rubber Sealing Ring, 2x Wrenches. 1x Paper Instruction. Easy to install: Installation takes few minutes only by yourself. Springs Precision designed and tested with using precise CNC controlled coiling equipment. Used to Modificate the Brake Spring Tension. Suitable for: Compatible with Logitech G25 / G27 / G29 / G920 Racing Wheels.( If you are not sure if your model can be installed, you can contact us to confirm.). Materials: Brake pedal spring set are made of high quality material. Sturdy and durable. Springs are perfectly balanced to provide an enhanced overall gaming experience. Improve lap time and consistancy when compared to an unmodified pedal. Advantage: Improve the feeling that the original pedals are too hard or too soft. Significantly improve the realism and feel of your Logi-tech racing pedal set. Simulates the pedals in a real car.