Using this hex key set is easy. First, decide which of the eight hex key sizes you need for your job. Once you've chosen the right one, you can adjust the angle of the key. Just press the button to unlock it, set it to either 90°, 135°, or 180°, and then release the button to lock it in place. When using it, apply a steady pressure to avoid stripping the screws. After use, wipe the keys clean with a dry cloth to prevent rust. Store it in a dry place to keep it in good condition. And remember, this set is built to last, so handle it with care and it'll serve you well for a long time.
