Service valve cores without losing the system charge. 
Unique design offers a locking device that holds the shaft in place
   while removing or installing the valve cores. 
Contents：
    1. Valve assembly
    2. Standard valve core remover / installer
    3. GM large bore valve core remover / installer
    4. JRA R134 valve core remover / installer
    5. Volvo and 8mm valve core remover / installer
    6. R134a H φ16 connector
    7. R134a L φ13 connector
    8. 5/16"FL swivel connector
    9. 1/4"FL swivel connector
    10. Adapter 1/4"M x 3/16"F
    11. Adapter 1/4"M x 1/2" ACME F
    12. H14 Wrench