HHIP 500mm x 300mm standard pole permanent magnetic chuck can be used for processing various magnetic conducting work pieces. For surface grinders, tool grinders, EDM and other applications. Chucks are sealed and lubricated to be maintenance free. Magnetic force on/off switch. Ceramic dense magnets for superior holding power. Removable handle. Table height is 58mm. T is 23mm. p is 1 + 3. Weight is 150 lbs.