Sturdy Material: Crafted from bakelite, this turnning knob grip ensures long etrm durability and resistance to wear and tear, making it ideal for frequent use in various machine operations Ergonomic Design: The revolving knob features a comfortable bakelite handle that provides a secure grip, allowing for smooth and efficient handling with minimal effort Versatile Application: Designed to fit seamlessly into different types of machinery, this through-hole revolving handle is suitable for use in lathes, milling machines, and other equipment requiring manual control Easy Installation: With its straightforward design, this crank handle can be easily installed onto your machine's shaft or rod without the need for tools or expertise Reliable Performance: Engineered to deliver consistent performance under various conditions, this revolving handwheel machine handle is an essential component for enhancing the functionality and precision of your machinery operations Specification: Material:Bakelite Size Chart:M10:7.98cm/3.14inch Package Includes: 1xTurnning Knob Grip Note: Please allow slightly errors 1-2cm/0.39-0.79inch differences due to manual measurement.