- Durable Anodized Aluminum Alloy: Constructed from a high hardness aluminum alloy, this tool offers exceptional durability and resilience. The anodized surface treatment enhances rust resistance, ensuring long-lasting reliability. - Universal Compatibility: Designed to work with common spark plug sizes of .394", 0.472", 0.551", and .630". Note: Not compatible with larger .709" thread spark plugs, providing versatility for various devices and applications. - Precision Adjustment: Achieve accurate spark plug spacing with this tool. Simply connect the spark plug, and use the screw knob to make precise gap adjustments, ensuring optimal performance. - Easy Operation: To use, insert the spark plug into the tool, measure the gap with the integrated sensor, and rotate the knob to adjust the gap distance. This straightforward process guarantees accuracy and user-friendliness. - Practical Applications: Ideal for automotive enthusiasts, professional mechanics, and DIYers, this tool is essential for tasks such as tuning engines, performing maintenance, and ensuring efficient combustion in various vehicles. - Key Attributes: - Material: High hardness anodized aluminum alloy - Compatibility: Works with spark plug sizes .394", 0.472", 0.551", and .630" - Performance: Provides precise gap adjustment for optimal engine performance Choose this reliable tool for all your spark plug adjustment needs and experience the difference in performance and efficiency.