Adafruit-Mini-Push-Pull-Solenoid-5V-1-1A-Adafruit-2776-P-The-Adafruit-Mini-Push-Pull-Solenoid-turns-digital-ones-&-zeroes-into-linear-mechanical-motion-for-those-times-when-the-rotary-motion-of-a-motor-or-servo-isn-t-appropriate-It-has-a-3mm-travel-which-means-that-when-power-is-applied-the-central-metal-shaft-pops-forward-by-3mm-enough-to-actuate-a-switch-push-a-lever-or-similar-small-action-P-P-When-5V-is-applied-it-actuates-&-when-the-power-is-removed-a-return-spring-pulls-the