Hex screws are commonly used on furniture, bicycles, machinery, and door handles—all items that you may disassemble and reassemble multiple times. The six-sided design and precise wrench sizes ...

Don’t get the wrenches mixed up. This isn’t something specific to the Amazon Basics set but to most L-shaped hex wrenches. It’s often not clear which size is needed for a specific task ...

Now use the speed of the drill to quickly tighten all the hex screws. Allen wrenches come in both SAE fractional-inch sizes and in metric sizes. The wrenches can be bought individually ...