The fitness equipment ball knob is designed with a spherical rotating spring mechanism, allowing for effortless adjustment of your exercise bike's pull pin. Its ergonomic handle ensures a comfortable grip, reducing hand fatigue during use. This versatile accessory is compatible with various brands and models of exercise bikes, catering to diverse user needs. Installation is , requiring no tools, making it a convenient addition to your home gym setup. Features -Color:Multi -Material:Iron -Size:8.00X4.80X4.80cm/3.14X1.89X1.89in -Note: screw -Effortless adjustment: the spherical rotating spring knob design allows for adjustment of the exercise bike's pull pin -Ergonomic grip: the handle is ergonomically designed to provide a comfortable grip, reducing hand fatigue during use -Durable construction: built to last, this knob can withstand long term use without easily breaking or wearing out -Versatile compatibility: suitable for various brands and models of exercise bikes, meeting the needs of different users -Easy installation: simple and installation process, no professional tools required, making it convenient and quick Package list: 1 x pull pin