♦ Size: Common 6 point, 7/8 inch (22 millimeter) hex fits almost all oxygen sensors; 3/8" drive for ratchets. | ♦ Quality: T2278F Oxygen Sensor Wrench is a heavy-duty tool which is made from premium Chrome Molybdenum steel, the socket allows users to exert maximum torque while the precision casting ensures accurate fit and function. | ♦ Design: This socket's slotted design allows you to remove oxygen sensors with the wiring harness still attached, and the unique off set design of the T7822F Oxygen Sensor Wrench delivers maximum torque with maximum convenience! Made to increase torque on hard-to-remove O2 sensors and allows you to access tough spots, easily! | ♦Using: Even if you don't have a lot of experience working with cars, you can replace your O2 sensor with this tool to help with your car's emissions and gas mileage. The sensors live in the harshest of environments and may require some elbow grease to remove, but this quality tool can save your knuckles and save you time! | ♦ Warranty: 100% Satisfaction Guarantee, As with all of our products, you are covered. If you don't like it, just return it and get a full refund. All we wanna do is to make you satisfy the wrench and the service we provide for you.