Ergonomics
Some tools are advertised as "ergonomic" or designed with ergonomic features. A tool becomes 'ergonomic' only when it fits the task you are performing and fits your hand without causing awkward postures, harmful contact pressures, or other safety and health risks.
If you use a tool that does not fit your hand—or use the tool in a way it was not intended—you might develop an injury, such as carpal tunnel syndrome, tendinitis, or muscle strain.
These injuries do not happen because of a single event, such as a fall. Instead, they result from repetitive movements that are performed over time or for a long period.
Unsafe practices may result in damage to muscles, tendons, nerves, ligaments, joints, cartilage, spinal discs, or blood vessels. Below are some ergonomic issues to consider when using hand and power tools.
When working with hand tools, it is good practice to maintain a neutral (handshake) wrist position. Remember, bend the tool, not the wrist.
Design tasks and select tools to reduce extreme flexion or deviation of the wrist.
The hand grip that provides maximum hand power for high force tasks. All the fingers wrap around the handle.
Pressure from a hard surface, point, or edge on any part of the body.
The hand grip that provides control for precision and accuracy. The tool is gripped between the thumb and the fingertips.
Knowledge Check Choose the best answer for the question.
1-2. What is a good rule when working with hand tools?
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