For caution in using the screwdrivers are as follows:Select the size of the mouth with a screwdriver, screw, grooved.Screwdriver must clean after use should be wiped to prevent screwdriver slip tool.Do not apply an implementation like screwdrivers to stab or carving material, or even used as a weapon against people by counsel.Regularly maintain and check the condition of the screwdriver, screwdriver, mouth mouth, chipped, or damaged or not.
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