Quoted from: http://www.wisegeek.com/what-are-the-different-types-of-screwdriver-handles.htm
Screwdriver handles vary in not only the type of material the handle is manufactured from, but in design as well. Smooth
screwdriver handles, angled handles and other handle shapes offer the user a firm grip when wet or when a screw is extremely tight. Different materials used in the manufacture of
screwdriver handles range from wood and steel to plastic and hard rubber. The color of a
screwdriver handle will often give the user valuable information about the tool, such as the type of
screwdriver being used or selected for a job.
Screwdrivers have many uses, however, the handle is a pertinent part of any
screwdriver and can offer the user protection, comfort and power. While the vast majority of
screwdriver handles are made of wood or plastic, some are made of steel, brass or aluminum, while others are made from carbon fiber or a similar polymer. The metallic
screwdriver handles offer indestructible quality, good looks and durability; however, they are dangerous when working around electrical devices. Wooden handles offer protection from electrical shock, although there are often metallic collars on a wooden-handled
screwdriver that can also be a dangerous component when working on an electrical device.
Only plastic or hard rubber
screwdriver handles should be used around electronic devices to avoid
electric shock or even death. Some screwdrivers specifically intended for use on electronics use a rubber sleeve on the
screwdriver shaft to aid in protection against shock. While the makeup of the
screwdriver handles can protect a user against
electric shock, the more important aspect to many users is the effect that the design of the handle has on torque and power when removing or tightening a screw. For this requirement, an octagonal or tri-sided handle typically gives the best results.
An octagonal-shaped
screwdriver handle offers a great amount of grip when twisted by the human hand. The force generated by this type of handle design is sufficient to remove most stubborn screws; however, in some situations, such as when working with wet or oil-covered hands, even this style of handle can slip from the grip when extreme pressure is exerted upon a tight screw or fastener. For the most torque and best grip in any condition, the tri-sided
screwdriver handle reigns supreme for many users. Three-sided
screwdriver handles permit the hand to grip a substantial surface and apply the most torque possible, even with wet or oil-covered hands.
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2008/09/10
