- Use the 12.5 mm (1/2 inch) double square hole drive and 22 mm (7/8 inch) flare nut socket for both professional mechanics and DIY enthusiasts. This versatile oxygen sensor wrench works seamlessly with a 3/8 inch ratchet or breaker bar for efficient operation. - OFFSET DESIGN: The unique offset design of our oxygen sensor bushings allows for easy access to both heated and non-heating oxygen sensors in tight or hard-to-reach spaces, surpassing standard wrenches in convenience and functionality. - HIGH-QUALITY MATERIALS: Crafted from high-grade steel, the socket wrench insert is designed for high hardness and durability. It offers stable dimensions and resistance to environmental elements, ensuring it won't crack, fade, or wear over time. - EASY INSTALLATION: Quick and straightforward installation process. Simply locate the installation spot, and with minimal effort, the socket tool can be successfully mounted. - Ideal for various scenarios, including automotive repairs where oxygen sensor access is challenging, routine vehicle maintenance, or special projects that require a reliable tool. Perfect for addressing oxygen sensor replacements and upgrades in tight engine compartments or restricted spaces. This oxygen sensor wrench combines functionality, durability, and ease of use, ensuring you can tackle any job with confidence.