Professional valve core loading and unloading tool for quick replacement of automobile air conditioning valve cores featuring 1/4 SAE and 5/16 SAE thread interface compatibility with 117mm length - constructed from high-quality brass metal with integrally formed design to prevent air leakage - features ball valve that opens and closes in just a quarter turn for quick and easy valve core removal without losing refrigerant - anti-aging, durable construction with high strength and hardness ensures long-lasting performance for automotive AC maintenance.