Features: 1. Suitable for households, electricians, factories, line maintenance, etc., with a wide range of applications to meet most needs. 2. When in use, the finger touches the top copper cap, and the test electric signal light will light up. 3. The heads made of high-quality steel are extremely durable. g 4. Small and light, easy to carry. Convenient and practical, home essential. 5. If you encounter any problems during use, please feel free to contact us, we will give you the best solution. Notes: 1. Due to the lighting effects and shooting angles, there is a color difference in the product, please understand. 2. Due to manual measurement, there is a tolerance in the product size. Specifications: Product name: Test Screwdriver Product w eight: about 15 g Packing w eight: about 20 g Product size: about 13.9 * 1.5 * 1.5 cm Packing size: about 14 * 2 * 2 cm includes: 1* Test Screwdriver