Slip Joint Springs

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Here are a few drawings of slip joint knife springs.

Pocket Spring

A spring for a single blade, it is pinned in place at the butt. An example of this spring would be the Cowboy and Rancher Pocket knives (Discontinued).

Pen Spring

A spring for a blade at both ends. An example of this is the Reverse Congress Muskrat (Discontinued).

Lobster Pen Spring

It is very seldom that you see this spring used.

A spring that has two blades at one end and one at the other. An example of this is the Hen & Rooster Lobster Pen knife (Discontinued).

3 - Blade Pen Spring

 Used in boy scout knives such as the Boker Scout Knife.

​Boker Scout or Camp Knife.