Manual tools: screwdriver tools using precautions!

1 and the blade screwdriver damage, dull, should always grinding wheel grinding with water cooling, not to repair the damaged blade screwdriver, such as they are, the deformation and damage or ruptures should be scrapped.

2 and do not use hammer handle end screwdriver hand eliminating gaps or pry method and other objects of metal burr.

3, a screwdriver tighten or loose in his hand, the workpiece will be workpiece clamp screw in the fixture, prevent solid.

4, should according to tighten the screws or loose slots head width groove selection of appropriate screwdriver, Cannot use small screwdriver to spin twist larger screws,

5 Cross-screwdriver used to tighten or loosen the screw with the head, Elbow screwdriver for space limit the screws.