What is a box end wrench used for?

• A. High Torque Wrench With Two Closed Ends.
• B. A Wrench With One Open And One Closed End.
• C. A Wrench With Ratchet Movement, Used With A Socket.
• D. A Tool Used To Tighten Or Loosen Allen Screws.

Answer: (A)

Box-end wrenches grip a fastener from all sides by surrounding it with a closed loop, which distributes torque over a larger contact area and resists slipping. That secure, high-torque grip is what makes them ideal for tightening or loosening nuts in tight spaces, and many box-end wrenches are double-ended (two ends of different sizes) for versatility. So describing a box-end wrench as a high torque wrench with two closed ends fits how the tool is designed and used. In contrast, an open-end wrench has an open gap and can slip more easily, a ratchet with a socket relies on a ratcheting mechanism plus sockets, and an Allen wrench is a hex key for internal hex screws.