Easy to Use: This spark plug thread tapping tool set is simple to operate and provides a convenient solution for automotive maintenance. It is a practical accessory that offers reliable performance for spark plug thread repair.Four Sizes: The spark plug thread repair tool includes four different insert sizes, compatible with various 14mm thread spark plugs. Tap dimensions: 73 x 24 x 11mm (2.9 x 0.94 x 0.4 inches). Spark plug insert thread diameter: 14mm (0.55 inches). The set includes four insert sizes and corresponding taps, designed for repairing 14mm spark plug ignition threads. Ideal replacement if your original tool is damaged or missing.s: Made from hardened carbon steel, these tools are durable and built to last. The construction ensures resistance to wear and provides long-term reliability, helping reduce replacement costs and extend the life of your spark plugs.Product Introduction: The M14 spark plug thread repair tool is user-friendly and effective. Package includes: 1 x rethreading tap, 4 x spark plug inserts. The set includes a thread tap and multiple inserts, making it a valuable tool for repairing damaged spark plug threads and extending spark plug service life.