Slime's 4-Way Valve Tool with 4 Valve Cores is compatible for all vehicle valves as well as air conditioning units. The 4-way tool helps in removing valve cores and replacing them with the new units included. Replacing valve cores is part of maintaining proper tire pressure which reduces fuel consumption and maximizes tire life. Best of all the process is simple. Meet the complete set for valve core care. Removes valve core, re-taps threads inside, re-taps threads outside and reams inside valve Compatible for all vehicle valves as well as air conditioning units Use the 4-in-1 valve tool to remove the valve core, re-tap threads and ream the inside of the valve Consists of four valves cores to replace the ones that are removed while working