![ss 180.jpg](./download/file.php?id=1410&sid=962790127bd58bba8ed2d9f006300d86)
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![9.16 spark plug socket.jpg](./download/file.php?id=1409&sid=962790127bd58bba8ed2d9f006300d86)
- 9.16 spark plug socket.jpg (71.07 KiB) Viewed 664 times
This may be more of a applications question than a tool question. My grandfather had 9/16 deep socket marked for spark plugs only. I also read on ths site that there were spark plug sockets 9/16 to 1 inch in 1941 . Does anyone have any idea what cars tool such a wide range of spark plugs? Thank you