A garlic press (also known as a garlic crusher in Australia, New Zealand and the United Kingdom), is a kitchen utensil to crush garlic cloves efficiently by forcing them through a grid of small holes, usually with some type of piston. Many garlic presses also have a device with a matching grid of blunt pins to clean out the holes.
Garlic presses present a convenient alternative to mincing garlic with a knife, especially because a clove of garlic can be passed through a sturdy press without even removing its peel. The peel remains in the press while the garlic is extruded out. Some sources also claim that pressing with the peel on makes cleaning the press easier.
Garlic crushed by a press is generally believed to have a different flavor from minced garlic, more of garlic's strong flavor compounds are liberated. A few sources prefer the flavor of pressed garlic. Raw-foods chef Renée Underkoffler says "a good garlic press makes dealing with garlic a clean pleasure. Pressed garlic has a lighter, more delicate flavor than minced garlic because it excludes the bitter center stem."