the clip part 5 of the mounting bracket 1 this results in the arrangement as shown in fig5 and 6 whereby several of a plurality of mounting brackets 1 a 1 b can be spaced and clampingly positioned along the length of a guiding rail 105 intended to be eventually mounted on the brackets 1 a 1 b once these have been properly attached to the wall surface 101 the mounting brackets 1 a 1 b are temporarily held in position by friction provoked by the resiliency of the flexible tongues and arms helped by the relevant first second third and or fourth detent projections 71 73 75 and or 77 this greatly assists in accurately positioning the mounting brackets 1 a 1 b on the mounting surface 101 and to ensure that these are properly aligned before fasteners are mounted to the holes 7 once the brackets have been properly attached to the wall surface the guiding rail 105 can be taken from its temporary position and repositioned for proper and final mounting when the mounting brackets 1 1 a 1 b are to be mounted close to a boundary surface 103 such as also shown in fig5 and 6 then the first and third distance elements 87 91 will.