L Type Allen Hex Key

also known as an Allen wrench or Allen wrench, is a tool used to tighten or loosen hex bolts and nuts. The following is a detailed introduction to the hex key:

Structural characteristics

Shape: Usually L-shaped or T-shaped, consisting of a curved handle and a hexagonal head that matches a hex bolt or nut. 

The short side of the L-shaped hex key is used to insert the hex hole, and the long side is used as a handle to provide torque; 

The T-key has a transverse handle, providing more torque and less effort to use.

Material: Generally made of tool steel, chromium vanadium steel and other materials, with high hardness and strength, can withstand greater torsion and is not easy to deformation or break. Some high-quality hex keys will also go through surface treatment, such as chrome plating, blackening, etc., to improve rust resistance and service life.

Specification and size

Hex keys come in a variety of sizes, with common sizes ranging from 1.5 mm to 10 mm, and even larger or smaller sizes to accommodate different sizes of hex bolts and nuts. In practical applications, it is necessary to choose the right size hex key according to the specific work requirements.