a method of permanently mounting bristles on a handle to form a brush , and a brush having bristles which extend preselected , irregular distances from the brush handle . first ends of bristles of substantially equal length are contacted against an insert element or a receiving body having a contour corresponding with the preselected , irregular distances . the insert element is heated to soften the bristle first ends or the receiving body , and then the insert element is cooled to harden the softened one of the bristle first ends and the receiving body , fastening the bristle first ends to the insert element . the insert element is fastened in a receptacle in the brush handle . as a result , the bristles extend from the brush handle with the corresponding contour . the several steps may be performed in various sequences .