Valve Core Remover Installer Tool and HVAC Service Wrench Set with Hex Bit Adapters, Dual Size SAE 1/4 to 5/16 Port, 5/16", 3/8" Refrigeration Service Wrench, 10 Valve Core. Good Adapter: Our Valve Core Remover Installer Tool is made of brass material, which is more impact-resistant than copper material.
