Feature: 1. Material: The probe hook is made of copper, which is excellent, good quality and extremely durable. 2. Function: Anti-fracture soft handle, copper needle, and manipulative test probe are more sensitive and better in testing. 3. Application: Suitable for connecting banana plugs, binding posts, can help you use the multimeter! 4. Dimensions: The diameter of the interface is 4mm. 5. Note: If you have any questions, please feel free to contact us, we will do our best to serve you. DIY Supplies: ELECTRICAL Model Number: Multimeter Test Hook Style: Test Stick Type: Test Hook Color: Red+black Scope of application: Multimeter Interface size: 4mm screw interface Probe hook material: Copper Extendable hook length: 7.5mm Package Included:2pcs Note: 1. Due to manual measurement, please allow an error of 1-3mm. 2. As different computers display different colors, thank you for your understanding, the actual product color may be slightly different from the image. _x000D_ _x000D_