Permeable tube or rectangular shell, the same magnetic field has a good role in gathering shackles when the load suction timely, fully formed closed magnetic circuit, and thus the magnetic force to the extreme. Sucker electromagnet most widely used in industrial robots. Pipe or rectangular shell permeability of the magnetic field has a good role gather shackles when the load suction timely, fully formed closed magnetic circuit, and thus the magnetic force to the extreme. This section is based on this sucker electromagnet Click principle, the use of closed circular tube guide magnet housing, built-in ultra-low-power magnetic induction coil, the coil when the current is continuously supplied, it will have a strong pull-in Face Attractive, reliable fastening of the load sucked. As a result of the overall potting and special high hardness surface treatment, all solenoids are waterproof and dustproof to some extent, corrosion-resistant. Such sucker electromagnet most widely used in barrier systems, robots, industrial robots.