ITEM NAME:Car Spark Plug Gage Currency-type 0.6-2.4mm Coin-type Caliber Measuring Tool Product Description Description: Spark Plug Gap Gauge Measurement Tool Coin-type Currency-type 0.6-2.4mm Range Spark Plug Gage Caliber Measuring Tool Specifications: Material: Zinc aluminum alloy Product size: Diameter 37.5mm/1.48", Thickness 3mm/0.12" Gross weight: 16g Indication: The Metric and British System are printed on both sides. Zinc aluminum alloy Function: The round hole is used to adjust the spark plug, and it can also be attached to the key ring. How to use: Insert the edge of the coin into the ignition gap of the spark plug. Use size: Metric System 0.6-2.4 (0.50-2.50)mm; British System 0.020-0.100inch. Notes: 1. There may be slight size deviations due to manual measurement, different measuring methods and tools. 2. The picture may not show the actual color of the item because of different photographing light, angle and display monitor. Included: 1 X Spark Plug Gauge.How to use: Insert the edge of the coin into the ignition gap of the spark plug. Function: The round hole is used to adjust the spark plug, and it can also be attached to the key ring. Included: 1 X Spark Plug Gauge.