4.4 MACHINES AND TOOLS Basic Mechanical Hand Tools A hand tool is any tool that does not need a motor to work and which is powered manually . There is a huge variety of hand tools, and they are classified according to the operations they are used for . 1 1 Here is a list of the main mechanical operations and the most common tools used to carry them out. DO Can you think of at least three power tools that you can find in a mechanical workshop? 1 MORE Hand tools have been used by humans since the Stone Age, evolving from simple stones to metal alloys during the Bronze Age. 1