Wholesale Handle Mini Screw Driver Bit

Is the bit harder the better?
A good beatle should use a good material, and the hardness of the bit is controlled by heat treatment. The hardness of the bit is not that the harder the bit is, the more durable it is. If the hardness is too high, it is easy to break the bit. The hardness is too soft, easy to slip, and is generally recognized as stable. The hardness is in HRC60.Generally, the commonly used screw specification is PH2. The main household appliances are PH2, the small appliances are PH1, and the precision instruments are PH0 or PH00.
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