Box graters are shit when you're serious about grating cheese. You're not using your large muscles effectively, the force of the cheese pushed against the grater tends to move the base, and the interior is not very large, which necessitates frequent clearing stops.
A high-quality flat grater is much better. You jam one end into your belly, and hold it horizontally extending away from you. You use your bicep, a strong muscle, to pull the cheese towards your torso. The grater stays in place and does not move down when you press the cheese against it because it is held in one of the depressions between your rock-hard abs you developed from grating cheese and a healthy outdoors-based exercise lifestyle fueled by nutritious cheese. Your grater is over a plate or bowl on the counter, which provides ample volume to quickly grate 2 pounds of cheese without stopping.
Not surprisingly, it was difficult to find a decent flat grater to link with a quick Amazon search. Big Box Grater has a stranglehold on America. :x After a bit more searching, I found this one:
It's more pricey, but assuming it's quality, with strong metal and not some thin flexible POS, a good grater is worth it.
*Dirigible shakes fist at Big Box Grater in anger*