An elongate, rigid blade holder has in its outer surface an elongate slot which is rectangular in cross section. An elongate, flexible squeegee blade has a first portion thereof extending downwardly into said slot and snugly between the sidewalls thereof. The remaining portion of the blade projects upwardly out of the slot and beyond the outer surface of the holder and has formed thereon at least one longitudinally extending printing edge. Each sidewall of the slot has formed in its upper edge a longitudinally extending recess opening on the outer surface of the holder and on opposite sides of the blade. Each of said recesses has an elongate, flexible blade locking rod removably press fit therein and frictionally engaged with the confronting side of the blade thereby removably securing the blade in the slot.