S-7 spark test Share https://www.iforgeiron.com/gallery/image/20311-s-7-spark-test/ Share on LinkedIn Share on X Share on Facebook {lang="reddit_text" Share via email Share on Pinterest More sharing options... Followers Spark test for a rod that was bought from Ebay advertised as S-7. The arrow tips of the sparks indeed do look like molybdenum arrows. This photo was taken with a Fuji Finepix camera using the "nite shot" mode.
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