Slipjoint Pocket Knives
Slipjoint Pocket Knives are intended for light and simple use. Their blades that do not lock. Once opened, a spring mechanism holds the blades in place so they can be folded at a certain amount of pressure. Most Slipjoint Pocket Knives feature more than one blade that come in different types (like straight edge, serrated, and saw). Some models include other simple tools such as scissors, corkscrews, and bottle openers.
Popular examples of Slipjoint Pocket Knives are the Swiss Army Knife made by Victorinox and Wenger, the United States Army Knife made by the Camillus Cutlery Company, and the German Army Knife.
Pocket pen knives
Pocket pen knives are small, thin knives with one or two pen blades. They were originally made to sharpen quill pens. The modern designs come with more knife blades. Larger pocket pen knives are called whittlers. They feature three to four knife blades. Some models have clip and spay blades.
Locking Pocket Knives
Locking Pocket Knives have locks to keep the blades in place. They look like slipjoint knives, only with the added safety feature. The knife blades are released by pressing a lever. Locking Pocket Knives commonly use Axis locks, liner locks, and frame locks. Most models have one blade only, which is as large as the handle.
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