1Main Function: This cable can be used for converting connection from heavy duty truck round 9 pin to your existing OBD2 16pin interface tool. 2Wide Applicability: Our adapter cable can be used as automotive diagnostic tool, scanner tool, truck diagnostic tool and etc, which is very useful and economical. 3High Stability: This diagnostic adapter cable is constructed from sturdy PVC material, which is wear and tear resistant, ensuring maximum reliability. 4Longer Lifespan: Our adapter cable is professional manufactured with elaborate workmanship, which has superior flexibility and stable characteristic, and durable for long lasting usage. 5Ideal Replacement Part: This adapter cable is convenient and easy to operate, which is a perfect and user friendly aftermarket part.