Check the listing for details. 1 Set Spark Plug Thread Repair Tools with M10x1.0 Inserts and M12x1.0 Tap. Condition: New. Listed at 22.49 USD. PRODUCT INFORMATION:Thread Format: MetricMaterial: High Speed SteelTap Type: Bottoming TapDrive Shaft: 1/4" Square DriveFlute: StraightColor: Silver Tone, Gold ToneTotal Length: 7.6cm / 2.99"Tap Thread Width: 9mm / 0.35"Tap Thread Diameter: 12mm / 0.47"Tap Pitch: 1.0Tap Thread Length: 2.5cm / 0.98"Screw Thread Pitch: 1.0Screw Thread Outer Diameter: M12Screw Thread Length: 17mm / 0.67"Inner Thread Inserts: M10x1.0OuterThread Inserts: M12x1.0PERFORMANCE:Made of quality materials, durable and reliable in use. Not easy to rust, corrode or peel.Spark plug thread repair kit universal used for automotive engine fixing. Simple and fast to repair of defective spark plug threads, to obtain a new highly stable and long-lasting internal threads caused by wear, rust, and misalignment.Designed to make the car work well and improve work performance.