Features: 100% brand new and high quality This hex key adapter is made of high quality steel alloy material, heat-resistant, anti-corrosion and durable for long time use. This ratchet wrench hexagon bit adapter kit is compatible with 3/16 inch and 5/16 inch hex valves, HVAC valve opener and AC service wrench. Package includes: 2x Service Wrench Hex Key Adapter. The black wrench adapter is easy to install, just use it with the air conditioner ratchet wrench, no need for extra tools to assist in the installation process, saving time and effort. The ratchet wrench hex head adapter kit can be used with ratchet wrenches for automobile repair, various mechanical repairs, industrial chemical, metallurgical and other industries. Package Includes: 2x Service Wrench Hex Key Adapter Specifications: Material: Carbon Steel Size: Approx.2in note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item.