If you want to give your project a bit of a nudge, try these solenoids!
These solenoids contain an electromagnet which when triggered, pulls the iron plunger into the solenoid. When the current is dropped, the plunger is released, and the spring pushes it back to it's original position.
Run the solenoids operate on 12V DC for the maximum pull. We recommend performing the switching with a relay or MOSFET.