Tool — objects and instruments used to perform work

Characteristics and components

Tools can be classified by how they operate (manual, mechanical, powered), by their material (stone, metal, plastic), or by intended use (cutting, fastening, digging, measuring). Many tools combine basic elements: a handle for control, a working edge or surface, and sometimes a mechanism that amplifies human effort. Familiar examples include the hammer, the wrench (spanner), saws, and the shovel.

History and development

Human use of tools stretches back to prehistoric times. Early stone flakes and cores from the Stone Age represent simple cutting and pounding implements. Subsequent periods such as the Bronze Age saw the introduction of metalworking, which produced stronger, more specialized implements. Among the earliest known implements are blunt smashing implements such as the bludgeon, and sharp-edged tools like the knife, both used by early humans for survival tasks.

Modern evolution

Over centuries tools progressed from individually crafted hand implements to mass-produced items, and later to powered machines during and after the Industrial Revolution. In the twentieth and twenty-first centuries the notion of a tool broadened to include electronic and information technologies: the telephone and the telephone network transformed communication, and the computer became a platform for innumerable digital tools and applications.

Types, examples and uses

Tools serve many domains: construction, agriculture, medicine, art, and domestic life. Writing implements like pens and pencils are tools for recording ideas; cutting tools such as knives and saws alter materials; and mechanical tools like hammers and wrenches shape, join, or dismantle objects. The following list highlights common categories:

• Hand tools: hammer, wrench, screwdriver, pliers (hammer, wrench)
• Cutting and shaping: saws, knives, files (saws, knife)
• Digging and earthmoving: shovels, spades (shovel)
• Information and communication tools: telephone, computer (telephone, computer)

Distinctions and notable facts

Not every object that helps perform work is a tool in common usage: machines and systems can be tools when they are used as means to an end. Tools can also be adapted into weapons, but the terms differ in intent; a weapon is designed primarily to harm. Tools reflect cultural and technological change and are central to human innovation, craftsmanship, and productivity.

For further general reading and curated lists of tools, see related resources and collections available through reference portals (tasks, Stone Age, Bronze Age, hammer, wrench, saws, shovel, telephone, computer, knife, pens, pencils, bludgeon, weapon, humans).