Electro-Holding Magnets. Electrical current is required to turn the magnet ON. Power is removed to turn the magnet OFF. Free leads, two-pole connector, Hirschman connector Threaded hole/s in rear face of magnet Bright nickel plated with machined face. Ideal for use in:. Machine tools Door locking / holding Feeder mechanisms Short stroke / high force operations Textile machinery Automation Office machines Grill locking Packaging machinery Remote hold / release