Use high-performance permanent-magnet materials Nd-Fe-B as the core, which makes it be smaller and stronger magnetism, magnetic power is stable forever. Remanence is almost zero with optimize-designed magnetism distribution. High safe coefficient, the biggest lifting capability is 3.5 times of rated. Handle switch with safety button, can operation by one hand, safe and convenient. The "V" design on subface makes it easier to lift up round and flat steel.