According to the different structure, it can be divided into solid spanner, box spanner, dual-purpose wrench, socket wrench, hook wrench, hexagon wrench, torque wrench, and other special purpose spanners such as percussion wrench. Spanners are usually made of carbon structural steel or alloy structural steel.

Among the installation tools involved in modern furniture industry, the hexagon wrench/hex-key spanner/Hexagon spanner is the most commonly used.
The key to the development of hexagon wrench lies in its unique features and many advantages

1.It’s simple and light.
2. There are six contact surfaces between the hexagon screw and the wrench, which are fully stressed and not easy to be damaged.
3. It can be used to screw in deep holes.
4. The diameter and length of the wrench determine its torsion force.
5. It can be used to screw very small screws.
6. Easy to manufacture and low cost.
7. Both ends of the wrench can be used.

Specifications: 1.5, 2, 2.5, 3, 4, 5, 6, 8, 10, 12, 14, 17, 19, 22, 27
A small hexagonal wrench has complicated manufacturing process. The authentic inner hexagon plate hands sold on the market are all made by hot stamping process. Only a small part of the fake and inferior products are of poor workmanship.

In order to save costs, it is one-time molding.
The manufacturing process of general hexagon wrench is divided into the following steps:
1. 45 ᦇ, 40Cr and 50 are rolled into hexagonal wires.
2. Blanking, 90 ° right angle forming.
3. Quenching, tempering, hardness requirements of hrc43-50
4. Surface treatment, descaling, blackening, electroplating, etc.
After a number of processes of processing, there is a molded hexagon wrench.