Plug Gap Tool | Electrode Compression Adjuster | 10mm 12mm 14mm 16mm

This tool helps you set the correct gap on your spark plugs. It works with common 10mm, 12mm, 14mm, and 16mm plugs. The design keeps the center electrode safe, which is important for engines that run hard. Features and Benefits - Universal Threaded Body - It fits the four most common spark plug sizes, so you don't need different tools for different cars. - Included Feeler Gauge - The 32-blade gauge measures from 0.020" to 0.100", letting you check and set gaps precisely. - Knurled Adjustment Knob - Gives you a firm grip to make small, controlled adjustments without too much force. - Machined Aluminum Construction - Keeps sensitive iridium and fine-wire electrodes safe, which you often find in turbo engines. Applications - Setting the gap on new spark plugs before you put them in, to match your engine's needs. - Checking and adjusting gaps on plugs you already have during a tune-up for better ignition. - Gapping plugs for high-output or turbo setups that need a very specific electrode distance.