Electro-perm magnetic chuck offers minimum mechanical deformation with solid one piece housing. This chuck is a COLD device. These chucks do not consume electrical power except when activation and deactivation of magnets power is required. This results in very less consumption of electricity as compared to conventional electrical chucks. EPM chucks are economical for operation and maintenance and also most powerful chucks. These chucks are switched ON and OFF with simple electrical pulse. A variable output from 20% to 100% is controlled from one push button switch. EPM chucks are entirely independent of external power supply during the holding of work pieces. So no risk when power fails. The demagnetization cycle of EPM chucks reduces possible residual magnetism in the work piece.