Watch how to cut the world's hardest foods with a modded kitchen knife

Kiwami Japan tried modding a cheap kitchen knife with serrations so it can cut through rock-hard foods like China Marble hard candies, macadamia nuts, and katsuobushi.

Bonus video: super-sharp knife made of heated cling wrap:

• Cut the world’s hardest food with a $1 kitchen knife (YouTube / kiwami japan)