Usage Tips:Description These replacement parts for feature star-shaped hand knobs and locking adjustment wheels, designed to provide a secure and comfortable grip. The ergonomic design ensures ease of use, making it simple to adjust and lock the walker components. Ideal for enhancing the functionality and safety of mobility aids. Features -Color:Black-Material:Plastic,Galvanised Carbon Steel-Size: 5.50X2.00X0.50cm/2.16X0.79X0.20in-Hole diameter:5.85mm-Thread:M6-Thoughtful design: the walker replacement parts feature a rounded shape with no sharp edges, providing a-Easy to grip: you can easily grasp, assemble, and use the walker knobs without any hassle-Toolfree assembly: assemble the walker parts by hand without the need for any tools-Durable materials: made from sturdy materials, these parts are built to last and ensure reliability-Universal compatibility: our walker parts are designed to be compatible with most brands of and rollatorsPackage list: 2 x walker replacement parts