Knife History: 2.6 Million Years From the First Stone Flake to MagnaCut

The Short Version

Every knife that has ever existed does one thing, which is to concentrate force along a thin line so that it parts material. The history of the knife is the history of three problems: finding a material that takes a thin edge and keeps it, attaching that edge to a handle that fits a hand, and carrying the result without cutting yourself. Stone solved the first problem brilliantly and the second and third badly. Steel solved all three. The folding knife, the lock, the clip and the automatic are refinements of the third. This page walks the line from the Oldowan to the MagnaCut in an X1 Atlas, and the first version of it, written in 2021, got a few of the dates wrong. Those are corrected below.

2.6 Million Years Ago: The First Edge

The oldest widely accepted stone tools come from Gona in the Afar region of Ethiopia and are about 2.6 million years old. Archaeologists call the tradition Oldowan, after Olduvai Gorge in Tanzania where Louis and Mary Leakey first described it. The technique is simple to describe and hard to do: hold a cobble of fine-grained stone in one hand, strike it near the edge with a hammerstone held in the other, and a sharp flake comes off. The flake is the knife. Its edge can be thinner than anything steel will take, and a fresh flake of obsidian or flint cuts hide and meat as well as any blade made since. What it cannot do is survive. The edge chips, the flake is thrown away, and another is struck.

Who made them is still argued. The 2.6-million-year date predates the earliest fossils confidently assigned to our genus, Homo, so the first knife makers may have been australopithecines or a species we have not found. In 2015 a team working at Lomekwi 3 in Kenya reported even older flaked stone, about 3.3 million years old, which would push the start of knife making back another 700,000 years. The find is accepted by many researchers and questioned by others, and the safe summary is that the knife is at least 2.6 million years old and may be older. Cut marks on animal bones from the same period show what the flakes were for: butchering carcasses that teeth and hands could not open. The knife is the tool that made meat eating practical, and meat eating is tied to the growth of the brain that eventually designed everything else on this page.

The Stone Age Refined: Handaxes, Blades and the First Handles

For well over a million years the flake and the chopper were enough. Then, around 1.7 million years ago, Homo erectus began shaping cores on both faces into the teardrop handaxe of the Acheulean tradition, a tool with a point, two long cutting edges and a thick base that fits the palm. The handaxe is the first object made to a mental template, and it spread from Africa to Europe and India and stayed in use for more than a million years, which makes it the most successful knife design in history by a margin that nothing will ever beat.

The next changes were about control. By about 300,000 years ago, Neanderthals and early modern humans were preparing cores so that a single strike produced a flake of planned shape, a method named Levallois after the Paris suburb where it was first recognized. By about 40,000 years ago, modern humans in Europe and Asia were striking long, parallel-sided blades from prepared cores, the first stone tools that look like knife blades to a modern eye, and retouching them into points, scrapers and backed knives with one edge blunted for the finger. And at some point in this stretch the handle arrived: blades glued into wood or antler with birch tar or pine resin and lashed with sinew. The best-preserved example is the flint dagger carried by Ötzi, the man found frozen in the Alps in 1991, who died around 3300 BCE: a small flint blade set into an ash handle with a woven sheath, carried on his belt. It is a fixed-blade knife in every respect that matters, and it is 5,300 years old.

Copper and Bronze: The First Metal Blades

Ötzi also carried a copper axe, which is the other half of the story. People in the Near East were hammering native copper into beads and small tools by about 7000 BCE and smelting it from ore by about 5000 BCE, and by Ötzi's time copper blades were being cast in open moulds across Europe. Copper is a poor knife material: it is soft, it will not hold a thin edge, and a copper knife has to be hammered back into shape after a day's work. Its advantage over stone was not sharpness but survival. A copper blade bends where a flint blade snaps, and it can be resharpened, remelted and recast.

Bronze, copper alloyed with roughly a tenth part tin, appeared around 3300 BCE in the Near East and spread over the following thousand years. It is harder than copper, casts cleanly into closed moulds, and work-hardens along the edge, so a bronze knife could be made thin and keep a usable edge for weeks. Bronze Age graves across Europe and Asia hold knives with cast handles, riveted scales of bone and wood, and decorated spines, the first knives that look like objects someone chose rather than tools someone made. The limit was tin. It is rare, the trade routes that carried it were long, and when those routes broke down around 1200 BCE, the metal that replaced bronze was the one that lay in bogs and hillsides everywhere.

Iron and Steel: The Material That Won

Iron was smelted in Anatolia by about 1500 BCE and became the common blade metal across the Mediterranean and the Near East after 1200 BCE. Pure wrought iron is actually softer than good bronze. What made it worth the trouble was that it was everywhere, and that a smith who heated it in a charcoal fire long enough found the surface absorbing carbon and becoming something harder. That something is steel, iron with a fraction of a percent to about two percent carbon, and the discovery that steel could be hardened by quenching it red-hot in water and then tempered to take the brittleness out is the central event in the history of the knife. Everything after it is detail.

The first version of this page said that early steel was made by rubbing wood ash onto the blade. It was not. Ash is mostly mineral and contains almost no carbon. Steel was made by carburizing iron in a charcoal fire, by melting iron with carbon in a sealed crucible, which Indian smiths were doing by about 300 BCE to produce the wootz ingots that became the Damascus blades of the Islamic world, or by folding and forge welding layers of iron and steel, the pattern welding of Viking Age and Japanese blades. Blast furnaces in medieval Europe, crucible steel in Sheffield from the 1740s, the Bessemer and open-hearth processes of the 1850s and 1860s, and the alloy steels of the twentieth century each made steel cheaper, cleaner and more predictable, but the smith of 500 BCE and the metallurgist of 2026 are working the same material and chasing the same balance of hardness, toughness and edge retention. The D2 steel guide explains how that balance plays out in a modern blade.

The Folding Knife: 2,600 Years of Putting the Edge Away

The first version of this page said folding knives were invented 600 years ago. The real figure is closer to 2,600. A folding knife with a bone handle was found at the Hallstatt type site in Austria and dates to about 600 to 500 BCE. Iberian folding knives of the pre-Roman period have been found in Spain. Roman soldiers and travelers carried small folding knives with bronze or bone handles across the empire. Viking Age sites have produced many more. None of these locked or sprang. The blade pivoted on a pin and stayed open because the hand held it there, which is why they were small and used for food, cord and leather rather than hard work.

The folding knife as we know it is a product of the cutlery towns. Sheffield, in the north of England, was making knives by the 1300s, when Chaucer gave his Reeve's miller a Sheffield "thwitel" in his belt, and by about 1650 it was producing cheap folding peasant knives in quantity. By about 1660 Sheffield makers had added the spring-back, a flat spring along the back of the handle that holds the blade open or closed under tension, which is the slipjoint mechanism still used in every traditional pocketknife. Large-scale production followed around 1700, and the Sheffield patterns, the Barlow with its long bolster, the Wharncliffe, the pen knife, the jack knife, spread across the Atlantic with the people who carried them. Spain's navaja, a long clasp knife with a ratcheting lock, dates from at least the 1600s and was one of the first folding knives with a lock. The folding knife anatomy guide picks the story up from the parts of a modern folder.

America: The Bowie, the Barlow and the Factory

American knife history starts with imports, Sheffield folders and Solingen fixed blades, and then with one fight. On September 19, 1827, on a sandbar in the Mississippi near Natchez, Jim Bowie killed a man with a large knife his brother Rezin had given him, and the newspapers made the knife famous. Within a few years, Sheffield and American smiths were turning out "Bowie knives," large clip-point fixed blades with a crossguard, by the thousand, and the pattern became the American hunting and camp knife for a century. The Green River knives of John Russell's Massachusetts works, from 1834, were the plain working version that went west with the fur trade.

The factories followed. Russell, then Camillus, Case, Schrade, Imperial, Western and Queen turned the folding knife from a craftsman's product into a mass-produced one between the 1870s and the 1920s, with drop-forged blades, stamped liners and jigged bone handles, and the American jack knife, stockman and trapper patterns date from this period. The automatic knife is part of the same story: George Schrade patented his push-button knife in 1892 and the Presto that came out of it was carried by American paratroopers as the M2 in the Second World War, a line we follow in the history of switchblades.

Stainless Steel and the Modern Folder: 1913 to the 1990s

In 1913 Harry Brearley, a Sheffield metallurgist looking for a gun-barrel steel that would not erode, found that an alloy with about 13 percent chromium would not rust either, and within a few years Sheffield was making stainless cutlery from it. Early stainless was a poor knife steel, soft and hard to sharpen, and the "stainless versus carbon" argument that still runs in every knife forum dates from the 1920s. It was settled, mostly, by better alloys: 440C in the 1950s, the Japanese AUS and VG series, and the powder metallurgy steels described below.

The folder changed in three steps. In 1964 Buck introduced the Model 110, a heavy lockback hunter with brass bolsters, and made the locking folder an American standard. "buck knife" became a generic term for the type. In 1981 Spyderco's first knife, the Worker, put a pocket clip on the handle and a round hole in the blade so it could be opened with the thumb of the hand holding it, and every one-hand folder since descends from it. And in the early 1980s the custom maker Michael Walker refined the liner lock, a spring leaf cut from the handle liner that snaps behind the blade tang, into the mechanism that made one-hand, one-piece-handle folders practical. The frame lock, the button lock and Benchmade's AXIS lock of the late 1990s are its descendants, and the anatomy guide compares them. By the 1990s the one-hand folder with a clip, a thumb stud or flipper, and a liner or frame lock was the pocketknife, and the assisted opener of the late 1990s and the modern double-action OTF automatic of the same decade are the last two mechanical ideas added to it.

The Steels of Today: D2, S35VN and MagnaCut

The last leap was in how steel is made rather than what it is. In conventional steelmaking the carbides that give a blade its wear resistance form as the ingot cools, and in a high-alloy steel they grow large and uneven, which makes the steel tough to grind and prone to chipping. Powder metallurgy, developed for tool steels in the 1970s and applied to knife steels from the 1990s, atomizes molten steel into powder and presses it solid under heat, so the carbides are tiny and evenly spread. Crucible's CPM process produced S30V in 2001, the first steel designed from the start for knives, and S35VN in 2009, which is tougher and easier to finish. MagnaCut, designed by the metallurgist Larrin Thomas and released by Crucible in 2021, rebalanced the alloy so that a stainless steel could match the toughness of the best non-stainless tool steels, and it is the steel in the X1 Atlas.

The older steel in most TEKTO folders, D2, is the other end of the same story: a high-carbon, high-chromium tool steel from the 1930s that was made for industrial dies and found to make an excellent knife blade, hard and long-wearing, with just under the chromium it would need to be fully stainless, which is why we coat it. The table puts the three next to each other. The D2 guide and the MagnaCut guide go deeper.

What Has Not Changed

Two and a half million years of change, and the thing in your pocket still does what the first flake did. It is still the tool you reach for before any other, the one you use ten times a day without thinking and the one that, a few times in a life, matters a great deal. The first version of this page said the knife was created out of the need for a fighting tool and became an everyday one. The evidence runs the other way. The first knives butchered animals and worked wood and hide, and that is what nearly every knife since has been for. What has changed is the law around carrying them, which varies by state in ways the stone knappers never had to consider. The 50-state knife law guide covers where each kind of knife stands today.