Just (don't) do it

[OliverNuther]

Found this on a cooking blog. Guess who's been using a pull through sharpener.

 

[Benuser]

Can be due to steeling as well. Reverse belly and protruding heel are the most common issues with vintages.

 

[OliverNuther]

Good point. I never thought of that.

 

[cheflivengood]

especially on aggressive diamond hones

 

[chipzaroy]

Yikes...

 

[ThEoRy]

I try to tell these people at work not to use that crap. Just the other day I held 2 knives that have seen consistent pull through sharpening up to a diamond flattening plate to show them the crowning. They were like, "Oh." I tried to warn them.