With a cordless power screwdriver, you can drive a large number of screws without tiring
your hands. A switch changes the direction of rotation, allowing you to both drive and
remove screws. Some models plug directly into a charging unit to replenish the batteries.
Others have a removable battery, so you can recharge one while using another.
Always use a screwdriver bit of the proper size. A bit that's too small can strip the
screwhead. Though you may have to bear down on the screwdriver to firmly seat its bit in
the screwhead, remember that screws are driven by torque, not by pressure.
Purchasing
Cordless power screwdrivers come with interchangeable slotted and Phillips-head bits of
various sizes. Some models have a locking shaft so you can operate them by hand, for
extra torque.
Other Names
Cordless screwdriver
Substitutes
One alternative to the cordless screwdriver is an adjustable power screwdriver. This is a
reversible, cordless screwdriver with a hinge in the middle of its body. It can be used in
two positions: with the conventional straight line of a screwdriver or with an angled,
pistol-grip hold. Speed and torque are generally adjustable.
Another alternative may be a cordless drill. Many models of cordless drill are also
designed to work as cordless screwdrivers.
Caution
- Never use a screwdriver for prying, punching, chiseling, or to open a can;
use tools designed for these purposes.
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Brought to you by Book of Skills and Tools and New Complete Do-It-Yourself Manual
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