DURATECH O2 Oxygen Sensor Socket Set — 5pc (three 7/8" sockets, M12 & M18 thread chasers) for tight spaces

This five-piece set bundles the most-used socket sizes and thread chasers for working on heated and non-heated oxygen sensors and vacuum switches on modern vehicles. Built from alloy steel with phosphating and heat treatment, the tools are engineered to resist wear while the slotted socket square and wide wire gate let you access sensors without cutting or pinching sensor leads. The included M12 and M18 thread chasers restore damaged threads or clear corrosion to help ensure a proper sensor fit.

What sockets are included and why those sizes matter?

The set contains three 7/8" (22mm) sockets: a 1/2" drive offset, a 3/8" drive offset, and a 3/8" drive long socket. These three styles let you reach sensors in tight engine bays, on exhaust manifolds, and deep in downpipes while matching common ratchet drive sizes.

• 1/2" drive x 7/8" offset socket for higher-torque ratchets
• 3/8" drive x 7/8" offset socket for limited-clearance access
• 3/8" drive long 7/8" socket for recessed sensors

How do the thread chasers improve sensor installation?

The set includes two thread chasers sized M12 x 1.25mm and M18 x 1.5mm that fit a 3/8" ratchet. They clear rust, remove debris, and reform slightly damaged threads so sensors seat correctly and reduce cross-threading when installing new units.

• M12 x 1.25mm chaser for smaller oxygen sensor ports
• M18 x 1.5mm chaser for larger sensor or switch threads
• Use with a 3/8" ratchet for controlled re-tapping and cleaning

What design touches protect the sensor and improve grip?

Each socket has a wide wire gate allowing the sensor lead to pass through without cutting or stressing the cable, protecting the sensor during removal. The square-drive holes include small slots that increase grip on the ratchet, helping prevent slippage under torque.

• Wide wire gate preserves sensor wiring when removing or installing
• Slotted square hole reduces ratchet slip for safer use
• Phosphated, heat-treated alloy steel resists wear and corrosion

Who is this for? The DURATECH 5PCS O2 Oxygen Sensor Socket Set is aimed at DIY mechanics, professional technicians, and automotive hobbyists who need a reliable, space-efficient kit for oxygen sensor service. If you work on late-model vehicles, perform emissions or exhaust repairs, or keep a basic shop toolset for diagnostics and replacements, these sockets and thread chasers cover the most common O2-sensor tasks while minimizing the risk of wire damage and cross-threading.