The YELLOW JACKET Hex Key Valve Adapter is a professional HVAC service tool designed for adjusting and operating refrigeration system valves with 3/16" and 5/16" hex fittings. Built for durability and precision, this adapter provides technicians with reliable control when servicing mini-split, refrigeration, and air conditioning systems.
Its compact design allows easy access in tight service areas, while the rugged construction ensures long-lasting performance in demanding HVAC applications.
