A grinder is a tool that is used to grind dried flower into smaller pieces so that it burns evenly when smoked, usually in a joint or blunt, or to make oil for edibles. Most of the time, a grinder is a small, portable container; By twisting the top piece, flower is loaded into the "teeth" inside and ground up.

Any tool used to break up flowers into smaller pieces is called a grinder. The majority of grinders are small, hand-held tools that crush a small amount of flower manually inside a chamber. The flower is pushed onto the pointed "teeth" of a grinder and sealed beneath a lid.
Most handheld grinders are made of plastic, aluminum, or stainless steel (ideally). Additionally, they may have multiple chambers: a top chamber for loading flower a chamber for collecting ground flower, and occasionally a bottom chamber for collecting kief, which is plant material that has been broken off.
Electronic grinders, which automatically grind your cannabis without requiring any effort on your part, are less common.

If you need enough buds to fill a joint, picking them apart with your fingers is a sticky, laborious, and time-consuming process that can be avoided with a grinder. Although ground flower will burn more evenly and completely than packed bud that has only been loosely torn up by hand, a grinder is not absolutely necessary to smoke flower from a pipe.

Flower can also be broken up with a grinder and cooked into oil or butter for edibles. However, if you do grind buds for cooking, grind them coarsely to make it easy to separate the plant material in a strainer.

Remove the top lid from a standard handheld grinder and place a small amount of flower into the pointed teeth. In order to fit larger flower into the grinder's top chamber, you may need to manually separate them.
After you have loaded the top chamber, manually twist the lid to crush the flower inside. Remove the lid and enjoy your ground flower once the entire batch has been ground up.To locate your ground flower in a multi-chamber grinder, you will need to unscrew the chamber below.

Your grinder will eventually become sticky due to the plant's natural resin. It needs the same supplies for cleaning as a glass pipe does:salt and isopropyl alcohol. Using a thin towel or Q-tip, simply rub a mixture of the two over the sticky parts of your grinder. The resin ought to begin to emerge from the grinder's surfaces with sufficient effort.