Chuck controller required additionally Double-face holding type permanent electromagnetic block suitable for various milling applications such as processing by MC. •As attractive force is provided from top and bottom faces, mechanical clamping is not necessary. It can be set on the machine table easily. •By fixing a work piece as it is overhung, five faces can be performed •Because it is EP magnet type, there is almost no worry of power outage, wire disconnection. Almost no heat is generated and therefore, negative influence to a work piece by heat is minimal. •As the power supply cable is of metal connector specification, it can be detached easily, and can respond to pallet changing or outer •Depending on work piece size or processing conditions, more than 2 pes of chucks can be used at the same time. ^The holding power applies to SS400, 50 mm thick, ground surface held on whole face.