EASY TO USE - This VIVOHOME refrigerant bottle opener is designed to accommodate all standard self-sealing R1234yf cans, facilitating the easy recharging of coolant in a vehicle; First, turn the handy counterclockwise to retract the internal pin; Next, screw the can-tap dispenser onto the R1234yf self-sealing can opening and connect it to the R1234yf charging hose; Then, turn the handy clockwise until the flat piston opens the valve of the self-sealing can; Finally, turn the handy counterclockwise, then R1234yf fills the hose and is charged into the air conditioning FREE HOSE ADAPTER - This R1234yf self-sealing tap also includes a 1/4" SAE female to 1/2" ACME male adapter, thus allowing the use of 1/2" hoses; This additional adapter is suitable for most standard HVAC hoses from automotive air conditioning systems and vacuum pump kits DURABLE CONSTRUCTION - The VIVOHOME refrigerant tank opener and additional hose adapter are constructed from high-quality, heat-treated brass, ensuring durability and long-lasting use; The self-sealing can tap features a screw-on T-handle design and a safety check valve, providing reliable performance even under extreme conditions LEAK PREVENTION - The precision thread crafted using superior technology, thick hermetically-sealing O-rings, and a fixing upper hex nut collectively ensure the creation of airtight seals, effectively preventing any leakage WIDE COMPATIBILITY - The R1234yf self-sealing can tap refrigerant dispenser comes with a tank adapter and can be used with all self-sealing R1234yf automotive air conditioning refrigerant cans; The 1/4" external connection thread of the refrigerant bottle opener can directly fit the R12 and R22 manifold; The 1/4" to 1/2" hose adapter is compatible with the 1/2" female fittings of AC charging hose The VIVOHOME R1234yf Self-sealing Can Tap and the 1/4" to 1/2" hose adapter are constructed from premium heat-treated brass, ensuring durability and long-lasting performance. Their streamlined design allows for effortless use with all self-sealing R1234yf refrigerant cans and bottles.