124-C COMBINATION WRENCH
The 124-C combination wrench with the four sizes most needed for servicing air-conditioning and refrigeration equipment:

• 9/16” hex for dust cap on access valves and plug oil check on compressor.
• 1/2” hex for compressor mounting bolts.
  
• 1/4” square for valve stem and service valves and old style compressor valves.
  
• 3/16” square for valve refrigerant charging tanks