Made of high-performance magnetic material, so it is small, light and strong in adsorption. Unique magnetic circuit and nearly no remanence. High safety coefficient and max. pull-off strength is 3.5 times of the rated lifting force. With security button, the handle can be operated by one hand, safe and convenient. There is V-shaped groove at the bottom of the lifter and it can lift corresponding round steel and steel plates with permanent magnetic force and without power supply. It can be operated in field and used to lift and carry steel products, mechanical parts and moulds.