As you might have guessed, a grinder is the tool you use to break your cannabis up into small bits for smoother-hitting bowls or for wrapping in rolling papers and blunt wraps. There are a number of ways to grind cannabis if you don’t have a grinder, but grinders speed up the process and offer perks like kief catchers. A kief catcher refers to the bottom chamber below the screen that gathers all the potent crystal kief knocked off the buds in the grinding process. You can scoop the kief out and add it to the top of your bowl, or use it later to press your own hash or cook edibles. Above the screen, you’ll find the grinding chamber with “teeth,” or the blades that do all the work. The lid of the grinder attaches to this part, and metal grinders typically have a magnet to help keep things secure as you grind.