This ball handle knob is made of high-quality plastic material, ensuring a long service life. It is widely used in video games, machinery, combination machine tools, woodworking machines, printing, textile, food processing, mining, and automotive applications, offering convenient operation. Features: - Made of high-quality plastic material for durability and long service life - Threaded knob design serves as a reliable replacement for machine operation handles - Smooth polished surface with fine workmanship for a secure and comfortable grip - Easy to install and designed for convenient use - Suitable for a wide range of industrial and mechanical applications Specifications: - Material: Plastic - Type: Ball Shape - Diameter: 40mm / 1.57 inches - Hole Thread Diameter: M12 - Weight: 282g Package Included: 6 x Machine Handle Knobs