The hand knobs and locking wheels are designed to fit various walker models, providing a versatile solution for mobility aid maintenance. The star-shaped knobs offer an easy-to-grip surface, making adjustments straightforward. These replacement parts help users maintain their independence by ensuring their remain in optimal working condition. Features -Color:Black -Material:Plastic,Galvanised Carbon Steel -Size: 5.50X2.00X0.50cm/2.16X0.79X0.20in -Hole diameter:5.85mm -Thread: M6 -Ergonomic design: the walker replacement knobs are ergonomically shaped for a comfortable and secure grip - Assembly: quickly assemble the walker parts without the need for any tools -Sturdy and durable: constructed from sturdy materials, these parts are built to withstand daily use -Wide compatibility: the universal design makes these parts suitable for most walker and brands -Enhanced safety: the rounded edges and design enhance user safety and comfort Package list: 2 replacement parts