Check the listing for details. HVAC Tool AC Schrader Valve Core Remover Installer Tool Set 1/4 and 5/16 Port. Condition: New. Listed at 17.08 USD. This air conditioning line repair tools kit includes everything you need to repair or replace the valve cores of your refrigeration equipment, such as valve core removal tool, wrenches, hex bit adapters, valve cores and brass adapters. The valve core remover tool is made of stainless steel, alloy steel, brass and polycarbonate, which are durable and corrosion-resistant. It has a dual-size interface of SAE 1/4’’ and 5/16’', which makes it compatible with R22, R12, R407, R410, R404, R32 air conditioning systems. The wrenches are designed with different sizes to fit various valve stems and caps. The wrench sizes are 5/16-4/1in and 1/3-1/4in. The hex bit adapters are 3/16-5/16in, which can be used with any standard drill or screwdriver. The valve cores are made of high-quality brass and rubber.