Refco
The combination ratchet wrench provides 4 sizes in one tool: 9/16" hex for dust cap on valves and for bolts on compressors, 1/2" hex for screws, 1/4" square for valves and 3/16" square for refrigerant cylinders.
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REFCO is renowned worldwide as leader in refrigeration service products and for their innovation in the HVAC-R equipment and tooling space.