Description: Package Included: Pin Knob for Stationary Bikes. Sports bike pull pin spring knob is compact, lightweight, and easy to use.Quick Release: The knob thread spring pull pin has built in spring handle, which will not scratch your hands when winding, convenient for use. Size 6.6cm/2.60inch.Easy to Use: The spring knob screw replacement part is quick to install, easy and labor saving, easy to store, and easy to carry.Widely Used: Spring knob pin for most exercise bike equipment, fitness equipment, some weight benches, etc.Application: The fitness bike pull pin spring knob is a good accessory, widely suitable for strength and fitness equipment, exercise bikes, etc. Specification: Material: PP Size Chart: 6.6cm/2.60inch Package Includes: 1 Pull Pin Spring Knob Note: Please allow slightly errors due to manual measurement and different monitors.