It's called a mill because it's what's known as a "toothless grinder." Instead of metal teeth, the device has a series of ridges that mill the weed when it turns. It's kind of weed marketing ...
The lineup of grinders are as heft as they are stately, using a proven mechanical design engineered to minimize friction and metal wear, while ensuring the weed is actually ground instead of being ...
But for durability, it's made of metal and works similar to a Zippo (using Zippo fluid ... Though it's maybe not the best weed grinder for most smokers, Brilliant Cut's stainless steel version is ...