How to use a screwdriver 1. When using , do not use it as a pry bar or chisel use.Before used, you should wipe the oil on the handle and the mouth so as to avoid skipping, after use , it should also be wiped clean 2.The correct way is to hold the screwdriver with your right hand, the palm of the hand against the handle, so that the tip of the screwdriver and bolt or screw slot to loose is in a vertical fit state. 3.When you start to loose or tighten something later, you had better press the screwdriver tightly and then use the wrist force to reverse the screwdriver; when the bolt is loose, you can gently press the screwdriver using your hand, with your thumb, middle finger and forefinger quickly turning the screwdriver. Precautions for use of screwdriver 1.Based on the tightened or loosened screw head groove width and groove, you can have an appropriate selection of the screwdriver; You cannot use a smaller screwdriver to screw a larger screw; Phillips screwdriver is for tightening or loosening the screwdriver with the head having the cross slot; the elbow screwdriver is used for the screw head with limited space. 2. If the screwdriver's knife-edge is damaged or blunt, it should be grinded at any time. With a grinding wheel to grind, water should be used to cool it. The unrepaired screwdrivers, such as the mouth being seriously damaged, deformation, hand handle cracked or damaged, should be scrapped. 3.You cannot hammer the tip of the screwdriver to open the gap or remove the metal burr and other objects. 4.Do not use a screwdriver to tighten or loose a grip in the hands. The workpiece should be clamped in the fixture to prevent wounding.
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