A tool (10) for manipulating a material (20) seated on a surface (30) or part thereof, the tool (10) comprising: an elongated handle (40) having proximal (42) and distal (48) ends )； an elongated handle (50), at a proximal end (42) of the elongated handle (40)； and a composite head (70), fixed by a central part (75) thereof to a distal end (48) of the elongated handle (50), the composite head (70) having a first tool section (80) having a first tangential angle at one end of the first tool section (80), less than 30 degrees, with respect to the elongated handle (40), and having a second tool section (90) with a second tangential angle at one end of the second tool section (90), between 60 and 120 degrees, with respect to the elongated handle (40)； so that the tool (10) can alternatively be used in a first orientation, to work on the material (20) substantially tangential to the surface, using the first tool section (80), or, rotating the elongated handle 180 degrees (40), in a second orientation, to work on the material (20) substantially orthogonal to the surface using the second tool section (90), characterized in that said first tool section (80) has a lateral profile that defines a first parabolic expression, and said second tool section (90) has a side profile defining a second parabolic expression, rotated with respect to the first parabolic expression； said first and second tool sections (80, 90) having a continuous, non-linear transition between said parabolic expressions； said distal and proximal ends (48, 42) of the elongated handle (50) having a longitudinal axis, distally offset.Una herramienta (10) para manipular un material (20) asentado sobre una superficie (30) o parte de la misma, comprendiendo la herramienta (10): una empuñadura alargada (40) que tiene unos extremos proximal (42) y distal (48)； un mango alargado (50), en un extremo proximal (42) de la empuñadura alargada (40)； y un cabezal compuesto (70), fijado por una parte central (75) del mismo
