1: According to different head can be divided into: round head, flat head (ie, head), the top of the stigma, wide dome round head, big round head (ie large flat head), hexagonal bearing head, Hex Head
Round head: is the most commonly used head type.
Flat head: a new design that can replace the round head and mushroom head, the head of the low-diameter large, the outer edge of the head along the edge of the characteristics that the high-shaped edge, so that the torque for high-intensity play a driving role, There are slight differences.
Top of the stigma: The diameter of the standard flat dome is smaller than that of the round head, but is relatively high due to the relationship of the groove depth. The smaller diameter increases the pressure acting on the small area and can be tightly combined with the flange and the raised surface layer The heads can be successfully applied to boreholes in boreholes due to the start of the tool in the drilling tool set for concentrating.
Dome wide edge: due to the head under the bound and weakened the inner part of the wire wear, and therefore the most common used in electrical and tape recorders, for the bow in its more fully bearing surface provides a more attractive Of the design type.
Large round head: also known as the elliptical top wide edge, is a low-profile, cleverly designed large-diameter head type. When the additional role of the combined tolerance allows, can be used to cover a larger diameter metal hole. Flat replacement.
Hexagon socket head: a wrench head with high hexagonal head size of the joint. Hexagonal completely by the anti-hole mold cold forming, the head has a prominent top of the depression.
Hexagon head: If the standard Hexagon socket head type, but at the same time in the head of the base has a protective surface to complete the assembly, so as not to damage the wrench.Sometimes the role of things far more important than the appearance.
Hexagon head: This is a standard type of torque applied to the hexagonal head, which has the sharp sharp corners trimmed close to the tolerance range. It can be recommended for general commercial use as well as for various standard modes and Because of its necessary second process to make it more expensive than the general hexagonal Chengxue.
2: According to the slot type points are: slotted head type (also known as slotted), cross-slot head type, eleven-word composite slot head type, meter slot head type of these four
Three: according to the standard can be divided into: GB (GB), German standard (DIN), American Standard (ANSI), British standard (BS)