A recess filling apparatus forms part of, or is for use with, a tool for driving a multiplicity of fixing elements into a work surface. The apparatus utilises a dispensing strip defining a multiplicity of chambers containing filler material, each chamber containing sufficient filler material for use with a single fixing element. The apparatus comprises means to support the dispensing strip, and means for locating a chamber that contains filler material in or adjacent to the path of a fixing element, and for advancing the dispensing strip prior to driving the next fixing element.