Hafting is a process by which an artifact, often made of bone, stone, or metal is attached to a haft (handle or strap). This makes the artifact more useful by allowing it to be launched by a bow (arrow), thrown by hand (spear), or used with more effective leverage (axe). When constructed properly, hafting can tremendously improve a weapon's damage and range. It is estimated that hafted weapons were most common during the Upper Paleolithic and Middle Paleolithic. It was one of the first tools where hominins took separate elements and united them into a single tool. The development of hafting is considered by archaeologists to have been a significant milestone. It was not only an improvement in the technology at the time; it also showed the progression of the human mind toward a world of complex tool-making. Hafting weapons is perhaps best known for its use by humans in prehistory, but it is still practiced by enthusiasts today and the handle of a tool such as an axe is still known as a haft. Many people still practice the hafting techniques by using old-fashioned methods to figure out the best way to attach a handle onto tools, while improving the overall structure and function. Hafting has evolved through the past and the idea can still be seen in the structure of modern-day tools such as hammers and axes. The evolution of hand tools would be greatly altered had the people of our past failed to invent the idea of hafting. The methods and processes of hafting have also varied and evolved over time. Hafting requires a means of attaching the artifact to the strap or shaft, and to this end, flanges are often created on one end (the end opposite the cutting edge). Flanges are produced by a process of knapping or grinding the excess stone away, resulting in indentations in the piece. If a shaft or handle is to be used, it must also be prepared in some way. Wood is frequently used (in the US, commonly Bigleaf Maple (Acer macrophyllum) due to its soft structure that eases chipping away at the end of the shaft to which the tool is to be affixed.