Is the screw thread a screw problem or a screw driver?
If the head and screw specifications are basically right, when the beginning of the screw, the knife head and screw groove must be forced to close tight, slow action.If the tool head is not worn out, there is no quality problem with the cutter head.A metal powder is not tight or cause because the specification does not match the cause.There is a screw driver specializing in clocks and watches, which is suitable for repairing small appliances such as notebooks, mobile phones and hard drives.
Determine whether the specifications match, you can first put the knife into the screw slot, gently rotating, and if you do not move, indicating that the specifications are appropriate, if you turn it, it is inappropriate.
If the screwdriver head is worn, the screwdriver head quality problems, if the screw head chute, the screw is not a quality problem, the screwdriver head selection specifications are not appropriate, the cutter head size should be used, and the screw groove, the cutter head is too small or too much too much, will cause the screw head chute. Abolish the screw groove generally by the cutter head selection caused by too much.
