this is the shellpuller design, you probably saw on the outsiders movie that ralph macchio carried to kill the soc(ralp macchio is the karate kid)
The shellpuller is named because it's design loks as if it could be used to remove shotgun shells from the chamber.
The switchblade is unique in it's activation method. It uses a lever to press down and is spring loaded.
My favorite is either bone, ivory, or some type of rare wood.
Thanks for reading!
Cells.