A sub like TIL, but for very mundane stuff

Ex. TIL that the four distict sides of a cheese grater serve different purposes

Medium holes with a cutting edge on bottom (look like large raindrops) : used for shredding.

Small holes with cutting edge on bottom : used for shredding when you want it finer than the larger size.

Outward protruding holes with spiky edges on all sides : used for grating.

Wide holes that look like a smiley : used to slice things to an even thickness.