To understand the lower socket cross wrench

Wrench is a hand tool used to grip, tighten, or rotate bolts, nuts, screw heads, pipes, or other items. It also refers to motor tools with the same purpose. The socket cross spanner will be introduced today.

Hand tools for turning bolts, screws, nuts and other threaded fasteners using the lever principle. Wrenches usually have openings or sockets for holding bolts or nuts at one or both ends of the shank. The bolt or nut can be rotated by applying an external force to the shank in the direction of thread rotation during use.

The socket cross spanner is generally called the socket. It is composed of multiple sockets with hexagon or dodecagonal holes and is equipped with handles, extension bars and other accessories. It is especially suitable for screwing bolts or nuts with very narrow positions or with very deep recesses.

The sleeve can be divided into metric system and inch system. Although the sleeve has the same concave shape, the outer diameter, length, etc. are designed for the shape and size of the corresponding equipment, and the country has no unified regulations. Therefore, the sleeve design is relatively flexible and meets the needs of the public. Generally, the socket cross spanner is provided with a set of socket heads of various specifications and swing handles, extension rods, universal joints, screw joints, elbow handles, etc. for inserting hexagon nuts.

L-shaped hexagonal bar wrench specially adapted for turning socket head cap screws. Hexagon wrench model is based on the hexagonal opposite side size, bolt size has national standards. Application: specially used for fastening or removing round nuts on machine tools, vehicles and mechanical equipment. 

The socket head of the socket cross wrench is a concave hexagon cylinder; Wrenches are usually made of carbon structural steel or alloy structural steel, with the specified hardness at the head and elasticity at the middle and handle parts.