There is described a replaceable wear part device (22) for attachment on a forward edge (2) on a work tool (1), where at least a portion of the forward edge (2) is formed of a wear part holder (21), as the wear part (22) is provided with a first sliding surface (222), and the wear part holder (21) is provided with a second sliding surface (213), which essentially is arranged as an extension of said first sliding surface (222), and the second sliding surface (213) is provided with a forward sliding edge surface (214) defining the sliding surface (213) against the wear part (22), where on the first sliding surface (222) is arranged an eminence (224) arranged to be able to lead a material flow (F) away from at least a portion of the sliding surface (213) of the wear part holder (21).
