Just tighten until it strips and back it off a quarter turn your good to go  . Seriously as others have stated ANY torque wrench will be better then just grunting a bolt/nut tight. There's a special place in hell for tire/wheel shops that use air guns set on stun to install lug nuts ! 
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2002 Boxster S Arctic Silver with black top with glass window and black leather interior. Jake Raby 3.6 SS ( the beast ) with IMS Solution. 996 GT3 front bumper , GT3 rocker covers and GT3TEK rear diffuser and Joe Toth composites rear ducktail spoiler .
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