Which tool is an L-shaped device used for hex screws?

• A. Hex wrench
• B. Crow foot wrench
• C. Box end wrench
• D. Open end wrench

Answer: (A)

When you’re dealing with hex screws, you need a tool that fits into a hexagonal slot and gives you good leverage. That’s a hex wrench, also known as an Allen wrench—the L-shaped design lets you apply torque with one end and reach into tight spaces with the other. Crowfoot wrenches are extensions used with a ratchet to grip external shapes, not internal hex sockets. Box end wrenches and open end wrenches grip external surfaces of nuts or bolt heads, not the internal hex recesses. So the tool designed for hex screws is the hex wrench.