The United States produced a massive array of slipjoint knife models from the mid-19th century to the present day. The following is a list of representative models and their defining features: •
Peanut—a very small ( or less) pocketknife, with a slightly irregular
ovaloid shape resembling an elongated peanut. Generally, it has two blades of different sizes/profiles opening from the same end. •
Barlow—a medium-sized pocketknife of tapered
oval construction, with one or two blades of different sizes/profiles opening from the same end. •
Sunfish or ''Elephant's Toenail''—a small pocket knife with a very wide body. It usually has two blades, one of which has the same wide body as the handle. The blades usually open from either end. •
Congress—a small pocket knife with a shallow concave back and a shallow convex top. Usually carries four blades that open at opposite ends. •
Sowbelly or
Stockman knife—a medium-sized pocket knife of , with a bend in the body. Three blades with one clip point, one with a sheepsfoot, and one spey blade is a common configuration. Blades typically open from both ends. •
Canoe—a medium-sized knife , rather wide with a slight curve. Generally, it has one large and one small blade at opposite ends. •
Trapper—a medium-sized pocket knife with a rounded end that tapers slightly towards the knife's end. Two blades with a clip point and a spey blade is a common configuration. Both blades open from the same end. ==Legal status==