Special socket wrenches.
(e) Special socket wrenches. Some socket wrenches are not detachable
and are of one-piece construction, such as the four-way socket wrench and the 90
offset handle shown in figure 8. Other socket wrenches are of the screwdriver
type, having a six-pointed or a square socket. These may be straight or offset and
have a T-type or regular screwdriver handle. Two types of stud remover sockets are
available that are used with any 3/4-inch square drive socket wrench handle. One
type has an eccentric cam which grips soft or hardened studs. The driving shank
extends through both sides of the housing to provide a bearing surface on each side
of the cam and prevent binding. The cam type has a capacity of 1/4 to 3/4 inch.
The heavy-duty wedge-type stud remover socket works on the wedge principle and
takes a positive grip which can be released only when the tool is turned in the
reverse direction. Two sizes of steel wedges are included with the socket. This
type has a capacity of 9/16 to 1 inch.
(f) Crowfoot wrenches. A crowfoot wrench (fig 6) has an open end in the
box containing notches and a square hole which fits the handle. They are used in
conjunction with the socket wrench handles having a 3/8- or 1/2-inch square drive.
They range in size from 3/8 to 2-1/2 inches.