6.0MMX100mm 4 inch single 480PCS/ctn every inch of 0.9 yuan plus 0.08 yuan

6PCS plastic bags price 5.3yuan 120PCS/CTN

1. handle is insulation material, high temperature resistance, oxidation resistance, strength. The friction is big, not easy to slip, the service life is longer.
2, the cutter bar with high quality chrome vanadium steel manufacturing, through batch rod, high hardness, large torque, the hardening treatment, sturdy and durable.
3, hardness is: 53-55 degrees, with strong magnetism is coated on the surface of the two chromium layer a layer of nickel
4, antirust performance beyond the ordinary screw batch 3 times
5 handle design special convex point effectively prevent sliding surface using special resin, anticorrosive oil 6
6, handle color can be according to customer requests for replacement. The above guest guest LOGO.
printed products

A: technology principle

two: the historical process of

The word is from the notch screw machine has been with the. It is impossible to replace the screw on the old machine. Cross screwdriver can be used in word slot, word slot of the screw is still in production applications, so to retain a slotted screwdriver. This new machine mostly with a cross slot screw, old is still in use, while using two screwdrivers.

Three basic functions:

repair mobile phone open the cabinet needs to use the screwdriver (some mobile phone shell is snap of no screwdriver). While the use of screws with the six screw nails; different phones have different specifications, generally T5, T6, T8, T7, etc., some models also equipped with special screws, need to use a dedicated screwdriver. Also need to prepare some small, small plum screwdriver. In the selection of such tools, the A, B sets of batches should be used, it includes almost all the phone's opening tool. When opening the case, according to the types and specifications of the machine casing fixed screw selection of the appropriate screwdriver. If the selection is not appropriate, it is possible to screw the screws of the groove, resulting in the phenomenon of slipping.

Four main types:

1, a common screwdriver

is the head handle made screws together, easy to prepare, as long as take out you can use, but because the screw has many kinds of different length and coarseness, sometimes need to prepare many different screwdriver.
2, combination type screwdriver
a the screwdriver head and the handle are separated screw group to install different types of screws, just the screwdriver head replaced can, do not need to prepare a screwdriver. The advantage is that it can save space, but it is easy to lose the screwdriver head.
3, electric screwdriver
electric screwdriver, just as its name implies is to electric motor instead of manpower to install and remove the screws, usually is combination screwdriver.

headforms

six angle HEXGONAL

Five: material

The cutter head screwdriver quality is spring steel for high hardness to do. A good screwdriver should be hard but not brittle. When the screw head openings become bald slip can be with a hammer percussion screwdriver and the screw of the tick groove deep for the screw and screwdriver to unscathed; screwdriver is often used to pry things, have certain toughness without bending will not break. In general, the hardness of the head of the screwdriver is greater than HRC60, and it is not easy to rust.