Floor battens are generally divided into internal angle battens, external angle battens, high and low battens and flat battens. As the name implies, the internal corner batten is the gap that presses the internal corner (for example, the internal corner of the indoor wall), the external corner batten is used to close the external corner, the high and low batten is used to close the indoor floor with height difference (for example, the floor with height difference at the junction of bedroom and living room), and the flat batten is used to close the expansion joints when laying a large floor. The layering is made of copper and pvc and is mainly used for decoration.