Features:*High-Quality Material: This product is made of high-quality material, durable, corrosion-resistant, wear-resistant, rust-proof, strong, not easy to break, and can be used for a long time.*Exquisite workmanship: This tool has exquisite workmanship and excellent material, which can bring you a good use experience.Easy to Use: Positive and negative battery post extender connectors, the big one is the positive pole of the battery, and the small one is the negative pole of the battery. Easy to install, easy to access, easy to wire, it can be easily and securely attached to the battery post.*Durable: Durable and wear-resistant automobile and motorcycle power accessories are convenient for your daily use and can reduce voltage distortion and transmission loss.*Wide range of application: used for replacement and repair of battery piles heads, widely used in cars, ships, trucks, load generators, etc.Notice:1.Actual color may be slightly different from the image due to different light effect.2.Please allow 1-3cm deviation due to manual measurement.Description:Material: brassScrew diameter: external threadM 6, internal thread M8Size: Positive: 17-19mmNegative: 15-17mm