Question: what tools are used to sharpen knives?
Answer: Sharpening Stone or Whetstone. | The whetstone is probably the most popular knife sharpening tool used. ... 
Sandpaper. | ... 
Sharpening Steel. | ... 
Knife Hone. | ... 
Electric Knife Sharpeners. | ... 
Handheld Sharpener. | ... 
Serrated Knife Sharpener. |