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Vibration Safety
This tool vibrates during use.  Repeated or long-term 
exposure to vibration may cause temporary or permanent 
physical injury, particularly to the hands, arms and 
shoulders.  To reduce the risk of vibration-related injury:
1.  Anyone using vibrating tools regularly or for an 
extended period should first be examined by a 
doctor and then have regular medical check-ups 
to ensure medical problems are not being caused 
or worsened from use.  Pregnant women or 
people who have impaired blood circulation to 
the hand, past hand injuries, nervous system 
disorders, diabetes, or Raynaud’s Disease should 
not use this tool.  If you feel any medical or 
physical symptoms related to vibration (such as 
tingling, numbness, and white or blue fingers), 
seek medical advice as soon as possible.
2.  Do not smoke during use.  Nicotine reduces 
the blood supply to the hands and fingers, 
increasing the risk of vibration-related injury.
3.  Wear suitable gloves to reduce the 
vibration effects on the user.
4.  Use tools with the lowest vibration when there 
is a choice between different processes.
5.  Include vibration-free periods each day of work.
6.  Grip tool as lightly as possible (while still keeping 
safe control of it).  Let the tool do the work.
7.  To reduce vibration, maintain the tool as 
explained in this manual.  If any abnormal 
vibration occurs, stop use immediately.
 SAVE THESE 
INSTRUCTIONS.
GROUNDING
TO PREVENT ELECTRIC SHOCK AND 
DEATH FROM INCORRECT GROUNDING: 
Check with a qualified electrician if you 
are in doubt as to whether the outlet is 
properly grounded.  Do not modify the power cord 
plug provided with the tool.  Never remove the 
grounding prong from the plug.  Do not use the tool 
if the power cord or plug is damaged.  If damaged, 
have it repaired by a service facility before use.  If 
the plug will not fit the outlet, have a proper outlet 
installed by a qualified electrician.
Grounded Tools: Tools with 
Three Prong Plugs
3-Prong Plug and Outlet
1.  Tools marked with “Grounding Required” have 
a three wire cord and three prong grounding 
plug.  The plug must be connected to a properly 
grounded outlet.  If the tool should electrically 
malfunction or break down, grounding provides 
a low resistance path to carry electricity away 
from the user, reducing the risk of electric 
shock.  (See 3-Prong Plug and Outlet.)
2.  The grounding prong in the plug is connected 
through the green wire inside the cord to the 
grounding system in the tool.  The green wire 
in the cord must be the only wire connected 
to the tool’s grounding system and must 
never be attached to an electrically “live” 
terminal.  (See 3-Prong Plug and Outlet.)
3.  The tool must be plugged into an appropriate outlet, 
properly installed and grounded in accordance 
with all codes and ordinances.  The plug and outlet 
should look like those in the preceding illustration.   
(See 3-Prong Plug and Outlet.)
Double Insulated Tools: Tools 
with Two Prong Plugs
Outlets for 2-Prong Plug
1.  Tools marked “Double Insulated” do not 
require grounding.  They have a special 
double insulation system which satisfies OSHA 
requirements and complies with the applicable 
standards of Underwriters Laboratories, Inc., 
the Canadian Standard Association, 
and the National Electrical Code.
2.  Double insulated tools may be used in either of the 
120 volt outlets shown in the preceding illustration.   
(See Outlets for 2-Prong Plug.)