5-piece oxygen sensor socket set, durable chrome vanadium steel, fits various O2 sensor sizes. 1. Comprehensive Set This O2 sensor socket set includes 1PC 12 Dr. x 78 22mm offset oxygen sensor socket, 1PC 38 Dr. x 78 22mm offset oxygen sensor socket, 1PC 38 Dr. x 78 22mm long oxygen sensor socket, 1PC M12 x 1.25mm thread chaser, and 1PC M18 x 1.5mm thread chaser. A complete kit to meet all your automotive oxygen sensor removal and installation needs. 2. Durable Reliable Crafted from premium forged chrome vanadium steel CRV, this tool set delivers exceptional durability and torque resistance, preventing deformation or breakage. The heattreated and phosphated surface enhances strength and corrosion resistance, ensuring longlasting, reliable performance even in demanding conditions. 3. Innovative Design The wide wire gate allows the tool to safely pass through the sensor wiring harness without damage. The socket features a slotted, antislip design and offset construction for easy access to hardtoreach areas, providing better leverage and control during use. 4. Thread Chasers for Repairs Equipped with M12 x 1.25mm and M18 x 1.5mm thread chasers, compatible with 38 ratchets. These tools are perfect for cleaning, repairing damaged threads, removing rust, and preventing future crossthreading, saving you time and effort during maintenance. 5. Wide Compatibility Designed for removing, inspecting, replacing, and installing both heated and nonheated oxygen sensors, as well as vacuum switches, on most vehicles with computercontrolled engines. This practical tool kit is a musthave for DIYers and professional mechanics, ensuring convenience and efficiency.