Prime Line 3/4, 13/16 Inch 19mm Spark Plug Socket Wrench 6 Point 70597
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Amazon.com: Thin Wall Spark Plug Socket Set Made in Japan 6-Piece, 16mm(5/8"), 18mm, 21mm(13/16"), Short & Long Extension, 3/8" Drive/17mm Shaft Metal Case Compatible with Honda Metro Triumph Porsche Volkswagen : Automotive
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Amazon.com: BikeMaster Magnetic Spark Plug Socket Set - : Automotive
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Amazon.com: OEMTOOLS 22891 3/8 Drive Magnetic Spark Plug Socket Set, Contains 5/8" (16 mm), 9/16", and 13/16" 6 Point Deep Sockets, Fits Most Car Spark Plugs : Tools & Home Improvement