Hvac service wrench set are made of high quality metal, strong, durable and corrosion resistant. the hex bit adapter is heat-treated black coating4 Different Sizes of Refrigeration Service Wrench Set: 1/4inch, 3/8inch, 3/16inch, 5/16inch, these sizes are the most commonly used sizes when repairing the conditonning and refrigeration equipmentDesigned for repair use, compatible with condition, refrigeration and other equipments needing repair and fixing; Compatible with opening and closing compressor service valves, rotalock val ves and shutoff val vesDouble-sided reversible wrench.The hvac service wrench features reversible design, which is flexible and convenient in daily useColour:silver+blackMaterial:carbon steelSize:140mmPackage Contents:1x Ratchet Wrench1x Hexagon Bit AdapterOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.