Man that ain't no straight. That is used in an industrial apple slicing machine. There is a large, automated machine that moves at 2000 rpm. This machine is used to slice apples into smaller pieces before they puree them into applesauce. The reason i know this is because i am pulling your leg.

But that thing cannot be a straight. Think of the weight that thing has and how would you use it going around the bend of your chin.