ScrewdriverUse screwdriver with safety, do the following: 1. use screwdriver to fit the mouth of the Groove of the screw head, or the four-headed bolts, such as oral Groove of the screw head must be a four-point star head screw flat Groove of the mouth must be a medium wind. 2. the thickness of the mouth of the screwdriver must fit in the Groove of the screw head. 3. the right hand grip screwdriver for right-handed, use right hand grip pens. Best left hand caught the right hand torque. Best left hand just to support carefully If this is not sufficient, use a wrench making the mouth of the dead. 4. use screwdriver to set straight, or perpendicular to the screw head. To unwind, screw, screwdriver, twist counterclockwise and twist clockwise to tighten it tightly. 5. torque screwdriver design only. Do not exert too much press. 6. do not hold the pieces in hand while using a screwdriver may be missed. 7. do not use broken or defective, such as screwdrivers butt crack or bend the flexible mouth. 8. tighten screw a piece of wood or steel hammer drill drilling should be taken first. 9. the head of the screwdriver and the screw mouth must not contain oil or grease. 10. do not use screwdriver instead of the extraction. Cast iron, steel or Rock Center. 11. do not use a hammer, screwdriver, hammer, screwdriver, except where these are designed to use a hammer to nail. 12. using the screwdriver, check light check electrical circuit. The butt of the screwdriver is not broken or crack insulation and should not be used to check the current or voltage circuit with high power mobile. 13. the later requires clean, dry, oil-free, stored in, or grease.
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