Features: Experience simple testing with our and black Not destructive piercing needle test Hook, designs to maintain cable integrity while providing a clear distinction between positive and negative poles. Crafted from high quality steel, steel, and materials, these test Hook feature a 4mm socket at the tail end, ensuring compatibility with a wide ranges of testing equipment. Suitable for electronic engineers, repair technicians, and DIY enthusiasts, this product caters to both professional and hobbyist needs. Perfect for circuit testing, troubleshooting, laboratory research, and routine maintenance of electronic devices, offering versatilities in various applications. Enhances your toolkit with these and safe test Hook, essential accessories for Precisions and efficiency in electrical testing tasks. Specifications: Material: steel Length: about 136mm/5.35inch Thread: about 4mm/0.2inch Package Includes: 2xNon destructive Test Hook note: Please allow 1 to 3cm error due to manual measurement, please make sure you do not mind before you bid, Due to the differences between different monitors, the picture may not reflect the actual colorful of the item.