Type: 12mm & 14mm Engine Spark Plug Caliper Gapper. 12mm and 14mm are usually for you. 1 x 14mm Spark Plug Gap Tool. 1 x 12mm Spark Plug Gap Tool. Easy to place your spark plug into the gap tool. No need more bangle the plug tip on a random surface to close it, and then use a coin gap to open it back up.
eBay