This standard 4mm banana plug is perfectly compatible with most multimeters and devices. It is made using pure copper injection molding technology, ensuring excellent conductivity and durability. The attached test hook is made of high-quality copper and equipped with a spring-loaded hook end, allowing for a secure grip and accurate measurement. It is suitable for use in laboratories, schools, automotive, household, and industrial environments. Each set includes two 3.3-foot long test leads, capable of withstanding up to 500V and 5A, ensuring safe and reliable testing. We offer a 30-day return/exchange guarantee and a 1-year warranty, providing confidence in your choice.