Check the listing for details. 1 Set Spark Plug Thread Repair Tools with M14x1.25 Inserts and M16x1.25 Tap. Condition: New. Listed at 19.99 USD. PRODUCT INFORMATION:Material: Stainless SteelColor: Silver Tone, Gold ToneTotal Length: 9.2cm / 3.62"Tap Thread Width: 12mm / 0.47"Tap Thread Diameter: 16mm / 0.63"Tap Pitch: 1.25mmTap Thread Length: 2.5cm / 0.98"Screw Thread Pitch: 1.25mmScrew Thread Outer Diameter: M16Screw Thread Length: 17mm / 0.67"Thread Tap: M16 x 1.25Inner Thread Inserts: M14x1.25OuterThread Inserts: M16x1.25PERFORMANCE:Made of quality stainless steel materials, durable and reliable in use. Not easy to rust, corrode or peel.Designed to make the car work well and improve work performance. The design is beautiful and elegant.INSTALLATION GUIDE:1. Match the intended thread repair kit.2. Check the size on the tap and inserts.3. Drill out the damaged bore or thread for the thread you are intended to restore(Drill tool NOT included)4.