​Slotted and cross-slotted screws can be seen everywhere in life, and the inner hexagon and outer hexagon are also very common. In addition to this, there are many other styles of drive bays that exist.

Briefly talk about some of the more common groove types:

① Cross groove: It is more common in household use. It is disassembled and assembled with a cross screwdriver. The advantage is that it is easier to apply force than the flat one.

② Addition and subtraction slots: It is more common for household use, and it is disassembled with a cross or flat-blade screwdriver.

③ Slotted slot: It is more common in household use. It is disassembled and assembled with a slotted screwdriver. The advantage is that the slot shape is slightly damaged, and a simple tool can be used to deepen the slot.

④ Inner triangular slot: generally used for household electrical products, using the triangular key to disassemble and assemble, the advantage is to protect the personal safety of electrical products and users (not to be opened by non-professionals without keys), and there is no obvious disadvantage

⑤ Hexagon socket: The use of mechanical products is relatively common, and the use of hexagon wrench for disassembly and assembly has the advantage of high versatility (in the machinery industry) and no obvious shortcomings.

⑥ Plum blossom slot: For the use of mechanical and electrical products, use a plum wrench to disassemble and assemble.

To sum up, the flat head and the cross head are common in self-tapping screws, and the torque required for tightening with the corresponding screwdriver is not large, and a slightly larger torque will screw up. The inner hexagon head and outer hexagon head are more common in bolts. They are used in occasions where the confinement torque is large. The outer hexagon bolts need to be tightened with a plate wrench or a set wrench, and the inner hexagon bolts need to be tightened with a hexagonal wrench. The head will not be twisted.