Sergeant is a manual tool commonly used in many professions, mainly in carpentry, which is made up of two jaws, adjustable with a screw through which, when rotating at one of its ends, it exerts pressure on the object or objects, generally made of wood, placed between said jaws.[1]​.

Clamps are used to hold pieces that are going to be machined (if they are metal) or that are going to be glued in the case of wood. Sergeants come in many different sizes.[2]​.

Its name comes from the French serre-joint, whose pronunciation in Spanish is similar to that of sergeant (sergeant).

Small clamps, whose body is metal and shaped like a C, are also known as a "C" press or "G" press.

Anthropologists believe that tool use was an important step in human evolution.[3]​ Since humans and wild chimpanzees use tools extensively, it is widely assumed that the first routine use of tools occurred before the divergence between the two species.[4]​ However, these early tools were probably made of non-permanent materials such as sticks or consisted of unmodified stones that could not be distinguished from others. stones as tools.

The stone artifacts date back to about 2.5 million years.[5] However, a 2010 study suggests that the hominin species Australopithecus afarensis ate meat by slaughtering and chopping up animals with stone tools. This discovery places the oldest known use of stone tools among hominids at about 3.4 million years ago.[6]​.

Finds of actual tools date back to at least 2.6 million years in Ethiopia.[7]​ One of the earliest recognizable forms of stone tools is the hand axe.

Until recently, excavated weapons were the only tools of "primitive man" that were studied and given importance. More tools are now recognized as culturally and historically relevant. In addition to hunting, tools are necessary for other activities, such as food preparation, "...cracking nuts, skinning, harvesting, and carpentry..." This group also includes "flake stone tools."

Tools are the most important items that ancient people used to get to the top of the food chain; By improving tools, they were able to perform tasks beyond the capabilities of the human body, such as using a spear or bow and arrow to kill prey, since their teeth were not sharp and yet were sufficient to penetrate the skin of many animals. The "hunting man" has been questioned as a catalyst for hominid change. Based on skeletal traces at archaeological sites, it is now more evident that early humans devoured the catch of other predators, rather than killing their own food.[8]​.