This invention is related with a drum (1) in washing/drying machines, preferably in front loading in washing machines, rotating with a motor around its central axis inside a tub, manufactured of non-metal a material such as made of plastics, comprising one or more plates (3) manufactured separate from that drum (1), to cover the manufacturing faults such as flash at the edges of drum perforations (2) so as to prevent harm to laundries.