Two screw extraction methods
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Photo 1: Coat the tip and turn
Slip a box-end wrench over the hex-shaped
“boss” near the screwdriver
handle (if equipped). Then coat the
tip with valve grinding compound
and jam it into the screw head.
Push on the screwdriver while you
crank on the wrench.
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Valve grinding compound
Valve grinding compound gives the screwdriver tip more grip.
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Photo 2: Hold, smack, turn
Get a solid grip on the impact tool.
Then smack the end with a hammer.
The blow automatically forces the
Phillips bit into the screw head and
twists it at the same time.
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Impact tools are available at auto parts stores.
It's easy to strip out a Phillips screw, especially if you belong to the “more
torque is better” club. Rather than mangle the screw head and then have to
drill it out, try these tricks.
At the first sign of “slippage,” coat your Phillips screwdriver tip with valve
grinding compound (sold at any auto parts store). Then try removing the
screw (Photo 1). If that doesn't work, buy a handheld impact screwdriver (sold at auto parts store). Smack the screwdriver with a hammer (Photo 2). The
“shock and turn” motion usually frees up the screw.