See Figure 3.
Use only sockets designed for impact wrenches. Always
select the correct size impact socket for nuts and bolts.
Using the wrong size socket may
damage the nut or bolt and cause the fastening
torque to be inaccurate or inconsistent.
 Unplug the impact wrench.
 Push the socket onto the drive shank until the detent
pin locks it into place.
 To remove the socket, pull it away from the drive
See Figure 4.
Proper fastening torque may be determined by the kind
of bolt, the size of the bolt, the material, or the workpiece.
It is helpful to perform a test operation to determine the
proper fastening time for the nut or bolt you are using.
While performing the test, make note of the speed
 Slide the socket over the nut or bolt.
 Depress the switch and fasten for the proper fastening
 Remove the impact wrench from the nut or bolt.
 Check the torque with a torque wrench.
Do not use this tool to install lug nuts
on wheels without a torque limiting device. Doing so
could result in galled or broken lugs.
Many variables exist that will cause the available torque of
the fastener to vary considerably.
NOTE: Using a universal joint or extension bar may
reduce the fastening force of the impact wrench and
require longer fastening time.
After the head of a nut or bolt has
seated, additional impacting will increase the chance
of shearing bolts, nuts, sockets or tearing into wood.