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How to demagnetize a magnetized object?

Many objects such as screwdriver in the workshop are ferromagnetic. And most of times these materials come in magnetized; is there any fast and simple way to demagnetize them?

We utilize magnetizer to charge magnet, and utilize demagnetizer to demagnetize. But is there any fast and simple households use to demagnetize item?

If you've read 8 Factors to Affect the Magnetic Force of Permanent Magnet, you're probably aware that high temperature, high humidity, external magnetic field and strong shock will affect magnetic force. Ferromagnetic items get magnetized because of long time of staying with strong permanent magnet which can be called external magnetic field influence.

The reason of demagnetization is to change the arrangement of atoms in magnetized items from regular to irregular as below picture.

Contact information
China Magnets Source Material Limited
Tower B, Qiongzhu Building,
Huawang Rd,Longhua District,
Shenzhen,China
Tel: +86 755 28174720
Fax: +86 755 28174720