Rectangular permanent magnetic chuckApplicationSuitable for lathe machines,grinding machines,and milling machine EMD,etc.FeaturesA,All metal top plates-hard wearing brass and steel      B,Extra strong magnetic force and less remaining magnetism C,While turning magnetic for ON/OFF,the face's accuracy of magnetic force surface doesn't change and can keep high precision processing surface; D,Coolant and water proof structure   E,Easy to operate handle     F,High performance at a competitive price