Craftsman 170.172440 Owner's Manual page 15

live electrical wires, or on any wall which
may have live electrical wiring behind it,
as the bit could conduct current to the
tool, creating an electrocution hazard for
the operator. Shut off breakers or remove
fuses to disconnect the circuit. Always hold
the tool by its thermoplastic housing, and
always wear eye protection when operating
this device.
Step 1 : Be certain that the box or fixture
which requires a cut-out is firmly mounted
and all wires or other obstructions around the
opening are pushed back out of the way. The
drywall cut-out bit uses the outer edge of the
box or fixture as a guide, so it is important
that there is nothing in the way which can
prevent it from guiding completely around the
opening. For the purposes of this instruction
manual, the procedure discussed will be to
make a cut-out around a standard 2 1/8" x 3
3/4" electrical box.
Step 2
Slide switch to turn the tool on. While holding
the cutting tool firmly with both hands plunge
the bit through the mark you made. Then
guide the bit to the right until you feel and
hear the bit touch the inside edge of the box.
Step 3
Pull the bit out far enough to slip it over the
edge of the box so it is now against the
outside of the box.
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Step 4
While keeping the bit in contact with the
outside of the box move the tool counter
clockwise while applying light inward and
upward pressure until you feel and hear it
come to the corner. As you round the corner
apply light pressure left and downward.
Step 5
While moving slowly and continuously along
the top contour you will feel the bit come to
the next corner. Round the corner and apply
light down and inward pressure until the
bottom corner is reached.
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