Make the area near the Cranks thread more evenly stressed and protect the Cranks paint Adding pedal washers could disperses force from thread to washer, avoiding matures wearing of Cranks / pedal thread Make of stainless Steels, strong, rustproof and enduring These pedal washers annoys caused by gaps resulted from over wearing of thread Suitable for bicycles, mountain bikes, road bikes can installed with all types of pedals