{"product_id":"dptool-thread-chaser-kit-8-piece-spark-plug-o2-sensor-repair-3-8-drive-heat-treated","title":"DPTOOL Thread Chaser Kit — 8-Piece Spark Plug \u0026 O2 Sensor Repair, 3\/8\" Drive, Heat-Treated","description":"\u003cp\u003e\u003cstrong\u003eDPTOOL's 8-piece thread chaser kit repairs stripped spark plug and oxygen sensor threads quickly, restoring factory-fit threads without replacing heads.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThis professional-grade thread chaser kit is built for automotive technicians and DIY mechanics who need a compact, reliable way to recondition damaged metric threads commonly found in spark plugs, oxygen sensors and drain plugs. The set includes eight heat-treated carbon-steel chasers in the most used sizes, a sponge case for storage, and an instruction manual to get you started. Designed for fast, repeatable results, the kit works with a 3\/8\" square drive for ratchet compatibility and improved access in tight engine bays.\u003c\/p\u003e\n\n\u003ch3\u003eWhich thread sizes are included and what do they fix?\u003c\/h3\u003e\n\u003cp\u003eThe kit contains eight chasers covering mainstream metric sizes for both spark plugs and oxygen sensors, plus general-purpose repair sizes. Each tool is labeled for quick selection so you can match the damaged thread to the correct chaser and avoid guessing.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eM10x1.00 and M14x1.25 combination tool for many spark plug fittings\u003c\/li\u003e\n  \u003cli\u003eM12x1.25 and M12x1.5 for additional spark plug thread types\u003c\/li\u003e\n  \u003cli\u003eM14x1.25 standard and limited-access long length for deep or recessed holes\u003c\/li\u003e\n  \u003cli\u003eM18x1.5, M20x1.5 and M22x1.5 for oxygen sensors and larger threaded components\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow does it save time and money compared with head replacement?\u003c\/h3\u003e\n\u003cp\u003eRe-threading with a chaser restores slightly damaged or corroded threads so you can reuse the original part or install a new sensor or plug without machining or replacing the cylinder head. That reduces labor, parts costs, and vehicle downtime.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eRestores stripped or misaligned threads to specification\u003c\/li\u003e\n  \u003cli\u003eCompatible with ratchet via 3\/8\" square drive for faster work\u003c\/li\u003e\n  \u003cli\u003ePrevents unnecessary head removal or expensive repairs\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat materials and durability features does the kit offer?\u003c\/h3\u003e\n\u003cp\u003eEach chaser is made from heat-treated carbon steel and finished with black phosphate for strength, wear resistance and corrosion protection. The treatment reduces friction during use and extends service life under workshop conditions.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eHeat-treated carbon steel core for toughness and hardness\u003c\/li\u003e\n  \u003cli\u003eBlack phosphate surface for rust resistance and lower friction\u003c\/li\u003e\n  \u003cli\u003eIncluded sponge case protects tools and keeps sizes organized\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow do I use the chasers safely and effectively?\u003c\/h3\u003e\n\u003cp\u003eOperate the chaser slowly with a ratchet or driver using the 3\/8\" square drive, keeping alignment true to the existing thread. Use a light film of grease or cutting lubricant on the chaser to improve cutting action and collect debris.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eInspect and choose the correct size before starting\u003c\/li\u003e\n  \u003cli\u003eApply grease or lubricant to the chaser for smoother operation\u003c\/li\u003e\n  \u003cli\u003eWork gently to avoid creating new damage; back out debris regularly\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for? The DPTOOL thread chaser kit is aimed at professional mechanics, automotive shops, and home enthusiasts who encounter stripped spark plug wells, oxygen sensor ports or damaged drain plug threads. If you service a variety of vehicles, need a portable repair solution, or want to avoid costly cylinder head work, this kit provides the most common metric sizes and the durability required in a professional setting.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Can this kit repair spark plug threads on most cars?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. The included M10, M12 and M14 sizes cover the majority of spark plug thread standards used in passenger vehicles.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Will the chasers fit a standard ratchet?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: They use a 3\/8\" square drive, so they work with common 3\/8\" ratchets and drivers for easy operation.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"DPTOOL","offers":[{"title":"Default Title","offer_id":48084115783838,"sku":"B0G4R7XNNW","price":73.98,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0781\/2041\/9486\/files\/dptool-front-packaging_74fd7f98-938b-4ef6-8353-f6d472dbec47.jpg?v=1785846708","url":"https:\/\/northtrailauto.ca\/products\/dptool-thread-chaser-kit-8-piece-spark-plug-o2-sensor-repair-3-8-drive-heat-treated","provider":"North Trail Auto","version":"1.0","type":"link"}