A screwdriver is a very common hardware tool in daily life. It is also a tool used to turn a screw to force it into position. It usually has a thin wedge head that can be inserted into the slot or notch of the screw head.

Screwdriver according to different head type can be divided into a word, cross, meters, star (computer), square head, hexagonal head, Y head, etc.; One word and cross is the most commonly used in our life, such as installation, maintenance, it can be said that as long as there are screws to use the screwdriver.

Hexagonal head is not used much, commonly used Allen wrench, like a lot of screws on some machines with a hexagonal hole, to facilitate multi-angle force.

The big star is not much to see, the small star is often used to remove and repair mobile phones, hard drives, notebooks, etc., we call the small screwdriver clock batch, commonly used star T6, T8, cross PH0, PH00 this kind of.

Chrome-molybdenum steel, this steel impact resistance is very good, hardness and toughness are very good, but the material is more expensive.
Chromevanadium steel, this material has good strength and toughness, is the ideal material for the production of wrenches, screwdrivers, etc., the price is not so expensive, is the life of the screwdriver general material,
Carbon steel, carbon steel refers to do not add other specific elements and the mass fraction of carbon is less than 2.11% of a class of steel, the advantage is high hardness, high strength, the disadvantage is poor toughness. This steel is not suitable for use as a screwdriver, but is widely used as a general tool material.
S2 tool steel, this alloy is a class of excellent impact resistant steel, used in the manufacture of high hardness Allen wrench, screwdriver, etc. The tool made of this steel has a high enough hardness after heat treatment. It has good wear resistance, certain strength and toughness.

Screwdriver The use of appropriate size and size of the tool not only small loss, but also good quality of the screwdriver can greatly reduce the damage to the product. Fair use makes tools toys. Using a screwdriver: A large screwdriver is used to tighten or loosen large screws. Hold the handle with your thumb, index finger and middle finger, hold the end of the handle with your palm, tighten or loosen the screw with appropriate strength, and place the knife edge into the head slot of the screw without slipping. Use of small screwdriver: Small screwdriver is generally used to tighten or remove the small screw on the wiring pile of electrical device. When used, the thumb and middle finger can be clamped to the handle, and the index finger can be used to twist the end of the handle. It cannot slip to avoid damaging the screw head groove.