Allen key的意思|示意

Allen key, also known as Allen wrench, is a tool used to drive socket head cap screws. It looks like a short, L-shaped hexagonal rod with a hexagonal recess at one end and a U-shaped handle at the other end. It is usually used for mechanical purposes in which a small wrench would be impractical.

The most common way to use an Allen key is to insert it into a compatible socket head screw head. As the key turns, the screw turns with it, allowing it to be loosened or tightened. To loosen the screw, the key is turned counterclockwise. To tighten the screw, the key is turned clockwise. Depending on the type of screw head and the handle design, the wrench can be used to apply a great amount of torque to the screw.

Allen keys often come in sets, which include keys of different sizes. This allows them to be used on screws that have either a short or a long shaft. Depending on the size and shape of the screw, Allen keys may also have multiple tips. These tips are designed to fit various types of socket head screws, allowing them to be tightened or loosened more effectively.

Allen keys are used in a wide range of applications, from household repairs to intricate machinery assembly. Most people carry a set of Allen keys in their toolbox, as they are a versatile and easy-to-use tool.