Material and insulation: Bakelite body provides insulation and voltage strength, enabling safe operation in demanding environments. Enhanced conductivity and durability: purity copper core significantly improves electrical conductivity while adding strength and abrasion resistance for longlasting performance. Handling and appearance: Mirrorpolished finish enhances shine and delivers a smooth handling experience for precise and effortless operation. Easy installation: Handtightens by hand in seconds without tools, greatly boosting work efficiency. Use scenarios In electrical control panels or instrument assemblies where insulated, voltage knobs are required. On industrial machinery interfaces that benefit from quick tool installation and durable, abrasionresistant components. In laboratories or testing rigs where precise, smooth adjustment and reliable insulation are important.