Jack Knives
Jack knives are large clasp knives that fold into their handles. Of all the knives, they are probably the most similar to switchblades, the only difference being that they are not spring-loaded; the wielder must manually pull out and re-close the blade. Some switchblades can be converted to jack knives by deactivating the button and removing the spring.
Swiss Army Knives
A Swiss Army knife is a type of multiblade knife that contains a straight blade and a variety of other tools, such as screwdrivers, scissors, corkscrews, nail files and fish scalers. Although they have a wider range of uses, these knives resemble switchblades in that they can be easily folded and carried.
Barlow Knife
A Barlow knife is a type of pocketknife that has two blades, both attached at the same end of the handle, with a metal bolster and a handle shaped like a tear drop. English in origin, the Barlow's two blades give it a variety of uses, such as whittling and coring apples.
Pen Knife
Originally used to sharpen the quills of fountain pens, the pen knife is a small, compact, folding pocketknife, designed to be carried on one's person without being seen. Like the switchblade, the pen knife is inconspicuous and easily concealed. However, the pen knife's blade is generally smaller than the switchblade's.
Survival Knife
Survival knives are designed to be used in emergency situations in the wilderness for activities such as cutting through wood or metal, or skinning an animal. Survival knives, which come in a variety of styles, are more utilitarian than switchblades, but can be easily deployed as a weapon. Most are serrated.
Bowie Knife
A bowie knife is a knife with a fixed blade named after U.S. pioneer Colonel Jim Bowie. Bowie knives, usually made of steel, are single-edged blades with clipped points, hilts and crosspieces, and are almost always approximately 15 inches in length. Although larger than the switchblade, the bowie knife is an excellent knife for self-defense and is often stored in a sheath.