【Sturdy Material】: Crafted from bakelite, this turning knob grip ensures long-term 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: 7.98 cm / 3.14 inches Package Includes: 1 x Turning Knob Grip Note: Please allow slight errors of 1-2 cm / 0.39-0.79 inches due to manual measurement.