Using this switch is super easy. Just hold the knob and rotate it. As you turn, the middle pin will make contact with different outer pins, giving you 8 different options. When mounting it on a panel, use the included washer and hex nut. Make sure they're tightened properly to keep the switch in place. For maintenance, you can use a dry cloth to clean the switch occasionally. Avoid getting it wet or exposing it to extreme temperatures. When choosing a knob, pick one of our T18 knobs as it fits the T18 - size shaft of this switch and makes turning more convenient.