Designed with metal threads, and spring pins in 2 different length of 26mm and 32mm, choose according to your need.Easy to use and quick to install.Adjustable pull pin spring knob, sturdy and durable.M16 pull pin knob, great replacement parts accessories.Wide application, suitable for exercise bike, indoor cycling bike, stationary bikes.Our products are made with the highest quality materials and are designed to provide you with the best possible user experience. We strive to ship out all orders within three days of purchase, and the estimated delivery time is 8-15 days.When shopping, please pay attention to the size and dimensions of the product to ensure that it meets your needs. In the title and , we have provided detailed information about the product, including its features and specificationsWe want you to be completely satisfied with your purchase, so if you have any questions or concerns, please don't hesitate to contact us. We are here to help and will do our best to assist you.Thank you for choosing our product. We hope you enjoy it