What component do torque wrenches commonly have attached to one end?

Torque wrenches typically have a socket of some type attached to one end because their primary purpose is to apply a specific amount of torque to a fastener, such as a bolt or nut. The socket is designed to fit the fastener, allowing the user to effectively transfer the required torque to tighten or loosen it with precision. Each socket is designed to fit different sizes of fasteners, ensuring versatility and functionality in various assembly tasks.

The importance of the socket in torque wrenches lies in its ability to ensure accurate torque application, which is critical in aerospace assembly where precise specifications are paramount for safety and performance. Using the correct socket also helps in preventing damage to both the fastener and the tool itself.

In contrast, while rotating disks, magnetic attachments, and levers for added force might be useful in different contexts, they do not typically serve the primary function of a torque wrench, which revolves around delivering accurate torque through a socket connection.