RECESSED
Recessed screws are now available in various
shapes. They have a cavity formed in the head and
require a specially shaped screwdriver. The clutch tip
(fig. 1-71) is one shape, but the more common include
the Phillips, Reed and Prince, and newer Torq-Set types
(fig. 1-73). The most common type of screw found is
the Phillips head. This requires a Phillips-type
screwdriver (fig. 1-71).
Phillips Screwdriver
The head of a Phillips-type screw has a four-way
slot into which the screwdriver fits. This prevents the
screwdriver
from
slipping.
Three
standard-sized
Phillips screwdrivers handle a wide range of screw
sizes. Their ability to hold helps to prevent damaging
the slots or the work surrounding the screw. It is a poor
practice to try to use a standard screwdriver on a
Phillips screw, because both the tool and screw slot will
be damaged.
Reed and Prince Screwdriver
Reed and Prince screwdrivers are not inter-
changeable with Phillips screwdrivers. Therefore,
always use a Reed and Prince screwdriver with Reed
and Prince screws, and a Phillips screwdriver with
Phillips screws, or a ruined tool or ruined screwhead
will result.
To distinguish between these similar screwdrivers,
refer to figure 1-74.
1-45
Figure 1-71.—Types of screwdrivers.
Figure 1-72.—Positioning screwdrivers.
Figure 1-73.—Comparison of Phillips, Reed and Prince, and
Torq-Set screwheads.
Figure 1-74.—Matching cross-slot screws and screwdrivers.
