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Non-symmetrical, elliptically-based geometric
configuration
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Five lobes with solid post in center of
recess
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Drivers only available to OEMs and authorized
service personnel
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Allows optimum torque transfer and increased
driveability
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Reduces fatigue and muscular stress during
manual assembly
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Non-symmetrical shape provides more resistance
to tampering
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Limited access to drivers maintains integrity
of system
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