Double-Handle Tools
Double-handle tools are measured by handle length and grip span. The grip span is the distance between the thumb and fingers when the tool jaws are open or closed.
Characteristics of ergonomically correct double-handle hand tools include the following:
The handles should allow a full hand grip.
- Handle Spacing: The handles should be spaced wide enough to reduce strain on the hands and wrists, typically between 2.5 to 3.5 inches apart.
- Handle Shape: Handles should have a comfortable shape that fits the natural curve of the hand, often with a slightly contoured design.
- Non-slip Grip: Handles should be made from materials that provide a non-slip grip to prevent slipping and reduce the effort required to hold the tool.
- Handle Length: The handles should be long enough to allow for a full hand grip, reducing the need for excessive force and minimizing fatigue.
- Weight Distribution: The tool should be balanced to ensure even weight distribution, reducing the risk of strain and injury.
- Padding: Handles may have padding to absorb shock and vibrations, providing additional comfort and reducing stress on the hands and arms.
- Edges and Surfaces: Select a tool without sharp edges or finger grooves on the handle. Select a tool that is coated with soft material.
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1-7. What is an important characteristic of the handles of a double-handle tool?
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