- Valve Core Remover Installer Tool: Replaces leaking valve cores quickly and easily. Remove and install valve cores without loss of refrigerant. Suitable for home refrigeration equipment. Dual size SAE ports 1/4" and 5/16" fit R22, R12, R407, R410, R404, R32 AC systems. Not suitable for Automotive AC. The ball valve opens and closes in a quarter turn rather than a stem-type valve. Curved design increases hand friction to help control during operation. - Good Application & Quality: Premium 1/4" and 5/16" SAE valve core removal tool for HVAC. Inserting into the inner valve core to control the valve core without stopping the machine or releasing refrigerant. Made of heavy duty stainless steel and copper materials, solid construction. - HVAC Service Wrench Set: 4 in 1 valve wrenches with sizes 1/4", 3/8", 3/16", 5/16". Ratcheting service wrench delivers higher work efficiency and smoother maintenance actions. Suitable for air conditioning, refrigeration and other equipment. Made of premium stainless steel. - Good Hexagon Head Adapter: Hexagonal drill adapter made of S2 material with hardness 60. Steel ball on top prevents it from falling out of the wrench. 2 inches long, sizes 3/16" and 5/16". Fits the 1/4 inch socket of the HVAC service wrench. Refrigeration AC ratcheting wrench tool with hex bit adapter for HVAC tech, gas furnace, air conditioning, refrigeration equipment. Small and convenient, a great choice for work and home use.