This adjustable pull pin knob is a must-have for fitness enthusiasts looking to maintain their exercise equipment. The ball-shaped design offers a comfortable grip, while the spring mechanism allows secure adjustments. Ideal for treadmills and exercise bikes, it helps you achieve your fitness goals with ease and safety. Features Thread: Rod diameter: 8mm -Color:Multi -Material:ABS -Size:8.50X5.00X5.00cm/3.34X1.97X1.97in -Robust construction: made of ABS material, this pull pin knob durability and longterm use -Detachable pull pin: the pull pin can be easily detached, offering a convenient solution for installation and replacement needs -Easy to install: designed for simple and quick installation, this replacement pull pin knob allows seamless replacement of fitness equipment components -Multifunctional use: compatible with a variety of fitness machines, this adjustment knob for exercise bike improves the performance and usability of your workout equipment -Flexible design: the ballshaped rotating feature provides enhanced flexibility, making it easier to adjust and use Package list: 1 x treadmill rotating pull pin