Herb grinder

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A grinder containing a small amount of herbs

The fine screen of a Space Case which will hold the larger pieces of herb. The bottom compartment is visible which is where the pollen will be collected.

An herb grinder (also called a "spice grinder", or just a "grinder") is a cylindrical contraption with two halves (top and bottom) that separate and have sharp teeth or pegs aligned in such a way that when both halves are turned, material placed inside is effectively shredded.

Some grinders also have two or three compartments instead of just one, with a fine screen separating the bottom compartment from the top. This allows fine particles such as pollen to pass through, but blocks larger plant material.

Grinders called "four-stages" are also popular. "Four-stages" are similar to regular grinders, but include a second fine screen to further separate "pollen" or other tiny plant matter.

There are also a 5 stages grinders by many manufacturers now and most are using an anodized process to coat the raw material they are made from.

Herb grinders are often used to prepare Cannabis for smoking. A pollen catching grinder will collect a more potent form of the medicinal plant known as kief.^[1]