A piece (20) of tie used in strips that has at least one piece (10) of hook to connect the front and rear sides especially of baby diapers and adult diapers, and formed as the complementary piece to fasten said piece (10) hook and characterized in that it comprises at least one surface or fabric (24) without loops and without knitting and at least one loop (26) individually formed on said surface or fabric (24) without loops and without knitting in a manner in which said loop ( 26) does not form fabric on its own, but is located on the base of surface or fabric (24) without knitting.Una pieza (20) de lazo usada en tiras que tiene al menos una pieza (10) de gancho para conectar los ladosdelantero y trasero especialmente de pañales para bebés y pañales para adultos, y conformada como la piezacomplementaria para abrochar la citada pieza (10) de gancho y caracterizada por que comprende al menos unasuperficie o tejido (24) sin lazos y sin tejer y al menos un lazo (26) conformado individualmente sobre dichasuperficie o tejido (24) sin lazos y sin tejer de una manera en que dicho lazo (26) no forma tejido por su cuenta, sinoque está situado sobre la base de superficie o tejido (24) sin tejer.