Features: Effortlessly repair severely threaded sparks plug holes with this professional tool, designed to clean damaged threads without leaving debris in the cylinder or requiring cylinder head removal. Features grease coated threads that trap metal shavings for clean extraction and is from high strength 42CrMo steel (equivalent to 4140 steel) for superior durability, fatigue resistance, and impacts toughness. Ideal for automotive technicians, motorcycle mechanics, and DIYer enthusiasts seeking a reliabled solution for precise thread restoration in engines and machinery. Perfect for workshop repairs or garage maintenance where damaged sparks plug threads require immediate attention without engine disassembly, ensuring minimal downtime. Engineered as a heavy duty precise tool, its hardened construction and debris trapping design make it indispensable for critical automotive repairs requiring professional thread rehabilitation. Specifications: Component: Steel Package Includes: 1pcs Thread Restorer Tool note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you donot mind befores you order. 2.Due to the differences between different monitors, the picture may not reflect the actual color. Thanks for your understandings.