1x Permanent Magnet Crane Magnetic Lifter Heavy Duty Crane Hoist Lifting Magnet. Anti-corrosion and anti-rust rings 2. Rotating labor-saving mechanical switch 4. Upgrade the Chamfering slot, strong contact adsorption 6.Easy to install, easy to use. Thank you for your support. Do write to us and give us an opportunity to address your concerns firstly. We are not responsible for undeliverable address. We will be happy to assist you. We would try our best to serve you with any question / problem.