It has holes on the bottom as well.
Please inform me of all the uses (and the name of) this tool.
It is a potato ricer. You place boiled potatoes in the basket and push the lever down to squeeze the potato through the holes. They are handy for making very smooth mashed potatoes, though they can be tricky to clean - washing them immediately or at least putting them in water so the potato doesn't harden is advised.
In Germany, it is also indispensable for making Spaghetti-Eis.
Also in southern Germany you would use it to make "Spätzle", a long kind of noodles made out of dough containing eggs, flour, milk (or water) and salt. Nowadays it is highly uncommon to use a device with holes on the side but I do know some people who still do. The device is commonly referred to as "Spätzle-Presse" or the one and only original "Spätzle-Schwob". The one with the side holes is preferably used for mashed potatoes, jam or juice.