Adapters are often used for Test & Measurement applications, for production and in the lab. They are also used in the field in a variety of communication systems applications. Performance grades range from low-cost commercial to rugged military. They can also be used in the field in a variety of communication systems applications (e.g., connecting two shorter cables together to make one longer cable). Adapters come in Straight, Right-Angle, Bulkhead / Panel Mount, and Tee configurations.