There are two main types, the one-piece (negative) and the cross (positive).There are also common hexagonal screwdrivers, including hexagonal and external hexagonal two.

Screwdriver Price

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Generally, among all screwdriver types, electric screwdrivers are more expensive, for example, the PROXXIMA electric screwdriver 3.6V lithium drill costs around $88, while one of the simplest screwdrivers costs around $9.90.For imported screwdrivers from Japan and other places, the price is usually around $35 a piece, and to make it more affordable, we might as well buy a domestic screwdriver handle with an imported screw head, which will make our work twice as hard and more cost effective at the same time.If you want to buy a shaped screwdriver, you will need to use the stock of the demolition bull bullet head series of screwdrivers, whose price is generally about $ 18 because of the shaped.

Screwdriver specifications

Generally the market is commonly used are relatively small specifications model size.The specifications of the cross screws are M2, M3, M4, M5, M6, M8. This refers to the diameter size of the countersunk head screws.Countersunk head screw lengths are 4, 5, 6, 8, 10, 12, 14, 16, 20, 25, 30, 35, 40, 45, 50, etc.The countersunk head screw length measurement includes the countersunk head thickness, which means that the countersunk head screw length is the total length including the head thickness.