Adjustable versatile design for testing a wide range of spark plug types and sizes The tool features an adjustable design that accommodates multiple spark plug types and sizes. This makes it possible to test different plugs with a single tool, reducing swap time and inventory needs. Easy-to-read gauge for quick assessment of spark plug performance The built-in gauge provides clear readings that enable a quick, at-a-glance evaluation of plug performance and condition. This helps technicians make faster, more informed diagnostic decisions. Durable construction for long-lasting use in automotive diagnostics Built with rugged materials and solid construction, the tool is designed to withstand regular use in automotive diagnostics and shop environments. It is built to endure common workshop conditions and provide reliable service over time. Key attributes Function - Enables testing and evaluation of spark plugs to verify fit and performance across different types and sizes. Compatibility - Supports a variety of spark plug types and sizes, reducing the need for multiple tools. Size and adjustability - Adjustable design to fit a range of plug dimensions, enabling versatile testing without swapping hardware. Material and build - Constructed from durable materials suitable for regular diagnostic work and shop use. Performance - Delivers straightforward gauge readings to aid in quick, accurate assessments and faster servicing decisions. Practical applications Scenario 1: Routine maintenance on a vehicle with different plug types - During a multi-cylinder service, quickly test and compare plugs of varying types and sizes using a single adjustable tool, saving time and simplifying inventory management. Scenario 2: On-site or workshop diagnostics for misfire or performance issues - When diagnosing a suspected plug fault, use the gauge reading to assess plug performance and determine whether replacement or further inspection is needed, without exchanging tools. Scenario 3: Restoration or classic engine work requiring non-standard plugs - For vintage or specialty engines that use larger or non-standard plugs, adjust the tool to fit and evaluate plug condition efficiently during restoration or tuning projects.