wadeo hvac service wrench, 3/8” to 1/4”, 5/16'' x 1/4'' refrigeration service wrench with hex bit adapter for air conditioning, refrigeration equipment repair - WADEO Hvac Service Wrench, 3 8 to 1 4., Refrigeration Service Wrench with Hex Bit Adapter for Air Conditioning, Refrigeration Equipment Repair. 4.5 out of 5 stars.. in the past