Principle: The strong neodymium magnets are embedded in a steel pot. The steel pot increases the adhesive force of the magnet on direct contact with a thick iron surface. If there is no direct contact with the counterpart, or if the steel plate is thin, painted or rough, you can strain it much less. Zhejiang Changxing Senda Bamboo & Wood Products Co.,Ltd , https://www.sendaflooring.com
Distinctive feature: These pot magnets can be fastened with a countersunk screw. We also carry pot magnets with cylindrical borehole.