The socket sizes are:
The one marked: 10 is a 16mm or 5/8
The one marked: 12 is an 18mm
The one marked: 14 is a 21mm or 13/16
The secret is the small retaining ball that grips the spark plug. This system eliminates magnets or rubber grips and allows the plug to "float" in the socket eliminating accidental cracking of the porcelain. The reduced shank also makes this the ideal socket for hard to reach areas such as Porsche 911, and VW rear plugs as well as many other applications. We have sold hundreds of these locally primarily on a word of mouth basis- this is a unique product that we recommend without reservation.
Want to make sure this part fits before you order it?
We will help you confirm fitment and compatibility! Send us a message with your V.I.N. number (usually stamped into the frame), and we will look up your machine to make sure you get the correct parts!