NW 3pcs DC3V-4.5V Extra Micro Electromagnet Electromagnetic Brake

I bought these just to experiment. Not sure what they were designed for. These have a permanent magnet at the base that pulls and holder the plunger in. There is no spring to push it back out. If you had something that mechanically pulled the plunger out past the magnet's attraction and then released it, then pulsing the coil would pull it in and the magnet would hold it in after the electricity is turned off.So, they "work" as intended, whatever that intent was. But as a standard pull-solenoid, however, these won't work.

Worthless they took forever to arrive like two months and never worked. They are about 1cm wide so very very tiny.

Good going ,these are great.

Does not work!