Toolwiz Spark Plug Gap Tool, 2Pcs Spark Plug Gapper Spark Plug Gapping Tool Compatible with 12mm 14mm Spark Plugs - Black & Blue Spark plugs require a precise gap to ensure proper ignition of the air/fuel mixture, and gapping them requires appropriate tools for your vehicle's specific plugs. Therefore, using a spark plug gap tool is vital. Toolwiz Spark Plug Gap Tool will be a perfect choice for gapping vehicles’ spark plugs FEATURES ★Universal spark plug gap tool fits for 12mm 14mm spark plugs. (NOT compatible with shorter reach spark plugs.) ★Not recommend to apply to a lawn equipment ★Solid construction with unique design allows the spark plug gapper a high precise performance ★Made of high-quality aluminum alloy, this spark plug gap tool is durable enough for long term use ★Provide you with the perfect gap to solve the problem that the vehicle failed to start for unproper spark plug gap distance ★Easy to operate. Just screw the spark plug onto the gap tool, then measure the gap thickness with a feeler gauge with desired size ★Spark plug gap tool is not for open up the gap, but only use to close. PRODUCT DETAILS Color: Black & Blue Material: Aluminum Alloy Gapper Fitment: 12mm/14mm Spark Plugs Package Size: 4.2 x 3.6 x 0.5 in/ 10.6 x 9.1 x 1.2cm HOW TO USE 1.Screw spark plug into the gapping tool, tighten the knob against spark plug tip. 2. Use your desired size feeler gauge for gap thickness measuring. 3. Tighten again the knob till the side electrode compresses to the desired gap thickness. 4. Unscrew the knob to loosen the spark plug and finish the spark plug gapping adjustment. Important Note: For more precise gapping, please use a feeler gauge in 0.001-inch smaller than the target gap for more higher precise. PACKING INCLUDE 1 x Mini Spark Plug Gap Tool (Black) 1 x Mini Spark Plug Gap Tool (Blue)