CM and CE cores consist of four core halves (see drawing bellow). The coil former is on the middle leg. The transformer has horizontal or vertical holders. The horizontal holder and cores are wrapped with a clamp. Vertical holders of a core are fixed to the corewith screws, washers and nuts. Cut cores are mostly used for power transformers, chokes and special transformers. C cores are distributed according to the standard; therefore they are listed underlabels CM and CE cores.