Butterfly Knife: History, Design, and Modern Balisong Features

What Is a Butterfly Knife?

A butterfly knife — also known as a balisong — is a folding knife with two rotating handles that counter-rotate around the blade's tang. When closed, the blade is concealed between the handles. When opened, both handles rotate 180 degrees to lock into place, exposing the blade. This unique mechanism has made the butterfly knife a distinctive tool in the knife world.

The distinctive dual-handle design of a butterfly knife, showcasing its unique folding mechanism.

Origins of the Balisong

The balisong is widely believed to have originated in the Philippines, where it was used as both a utility tool and a self-defense implement. The name "balisong" comes from the town of Balisong in the Batangas province. Over time, the butterfly knife design spread globally and became popularized in films and martial arts, cementing its status as an iconic blade format.

Anatomy of a Butterfly Knife

• Blade — typically a spear-point or clip-point profile, sharpened on one or both sides
• Tang pins — small posts that create a stop when the handles are fully opened
• Handles — two separate handle slabs (tang and bite side), connected by pivot pins
• Latch — a locking mechanism at the end of the handles that secures the knife when closed

Modern Butterfly Knife Designs

Today's butterfly knives range from traditional Filipino designs to modern precision-machined iterations. Handle materials have evolved from basic wood and horn to titanium, G10, and carbon fiber — offering improved durability and grip. Blade steels have also advanced, with options like D2, 12C27, and stainless alloys providing excellent edge retention.

While butterfly knives are known for their flipping and manipulation techniques (commonly called "balisong flipping"), they also serve as functional cutting tools. The handle geometry provides a secure grip when opened, and the blade lock ensures safe use during cutting tasks.

Legal Status

Butterfly knife laws vary significantly by jurisdiction. Some regions classify them as restricted or prohibited knives due to their one-handed opening mechanism. Before purchasing, verify your local regulations. Many manufacturers now produce trainer versions with unsharpened blades for practice and flipping without legal restrictions.

For those interested in the broader world of folding knives, Artisan Cutlery offers a wide selection of folding pocket knives across various lock types and blade shapes, including modern EDC designs with innovative opening mechanisms.

Balisong vs. Traditional Folding Knives

The balisong differs from standard folding knives in several ways:

• Dual handles — the blade does not have a dedicated spine; both handles rotate around it
• No spring assist — opening relies entirely on wrist motion and handle manipulation
• Unique locking — the tension between the tang and handles creates the lockup, rather than a liner or frame lock

For most everyday cutting tasks, a standard folding knife with a reliable lock mechanism is more practical. However, the butterfly knife remains a fascinating piece of knife history and a collectible in its own right.

Explore more knife types and locking mechanisms in our Knife Types collection at Artisan Cutlery.