PM500 is a high power magnet used in combination with the DOA wheeled folding levers APS90 - APS80 when is needed to lift very heavy ferrous covers or covers that are firmly blocked by incrustations, rust and time. The magnet use guarantees easy, fast operations in total safe conditions. The magnetic action is activated and deactivated by an ON/OFF lever that gives instant control and an easy detachment after the use, PM500 is used with the folding levers engaged in the upper lifting ring but magnet PM500 can also be used lifted by mini excavators or cranes particulary when the combination weight/incrustation and metal dilatation in summer firmly block the covers. PM500 can also be lifted by mini excavators or cranes In case of extremely heavy blocked covers is possible use as grabbing point two PM500 in parallel to double the lifting magnetic force