Keep in mind that there are several specs you might have to deal with when selecting proper solenoids for a given applications, such as:
Coil voltage
Max current draw
DC or AC
Rotary or linear plunger travel (yes there are rotary solenoids avalible)
Total mechanical plunger travel
Plunger pulls in or pulls out with applied voltage
Pull or push-force
if the plunger has a spring return or not when de-energized.
Also keep in mind that plunger pull-in force is not constant across the the full travel range.
Lefty