How to use a screwdriver.• Select the size of screwdriver to fit the screw heads must solve.• Check the screwdriver that is in good condition or not.• How to use the right tool, screwdriver, tightening the grip of the butt of the shaft while holding the left hand screwdriver screwdriver down the shoulder screws fit. Use left hand to handle gently stick the screwdriver a screwdriver touch the screw Groove all the time.• Both Khan and a screwdriver to press at the Middle screw tight, make sure the screwdriver to the screw's Groove all the time to prevent screw heads to praise.• Do not use screwdriver to poke holes in the sheep rock unit of all kinds of work, or use a screwdriver instead of extraction.
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