An enlarged head fastener device having a nail-like arrangement, comprising: a shank extending along a shank axis and between a first end and a second end; said shank having an exterior surface that extends between said first end and said second end of said shank; a tip disposed at the first end of the shank; a head disposed at said second end of said shank, said head extending outwardly from said second end of said shank in a transverse plane that is substantially perpendicular to said shank axis to define a head periphery; said head having an anterior side adjacent said second end of said shank and a posterior side opposite said anterior side; and at least one ridge formation disposed on and projecting from said anterior side of said head for reinforcing said head, characterised in that said at least one ridge formation extends continuously between an outboard end positioned on said anterior side of said head adjacent said head periphery and an inboard end that is closer to said second end of said shank than said outboard end, wherein the inboard end is positioned on the exterior surface of the shank at a location adjacent the second end of said shank, said anterior side of said head includes a bearing surface and a convergent transition portion, said bearing surface extending inwardly from an outer radius edge adjacent said head periphery to an inner radius edge, said convergent transition portion extending inwardly from a large end adjacent said inner radius edge of said bearing surface to a small end adjacent said second end of said shank, said convergent transition portion having an outer surface that extends between said large end and said small end, and said at least one ridge formation extending across said outer surface of said convergent transition portion, wherein the bearing surface defines a reference plane that is substantially parallel to the transverse plane; wherein the shank has a smooth outer surface along its full longitudinal extension from the first end until the inboard end adjacent the second end of said shank. a shank extending along a shank axis and between a first end and a second end; said shank having an exterior surface that extends between said first end and said second end of said shank; a tip disposed at the first end of the shank; a head disposed at said second end of said shank, said head extending outwardly from said second end of said shank in a transverse plane that is substantially perpendicular to said shank axis to define a head periphery; said head having an anterior side adjacent said second end of said shank and a posterior side opposite said anterior side; and at least one ridge formation disposed on and projecting from said anterior side of said head for reinforcing said head, characterised in that said at least one ridge formation extends continuously between an outboard end positioned on said anterior side of said head adjacent said head periphery and an inboard end that is closer to said second end of said shank than said outboard end, wherein the inboard end is positioned on the exterior surface of the shank at a location adjacent the second end of said shank, said anterior side of said head includes a bearing surface and a convergent transition portion, said bearing surface extending inwardly from an outer radius edge adjacent said head periphery to an inner radius edge, said convergent transition portion extending inwardly from a large end adjacent said inner radius edge of said bearing surface to a small end adjacent said second end of said shank, said convergent transition portion having an outer surface that extends between said large end and said small end, and said at least one ridge formation extending across said outer surface of said convergent transition portion, wherein the bearing surface defines a reference plane that is substantially parallel to the transverse plane; wherein the shank has a smooth outer surface along its full longitudinal extension from the first end until the inboard end adjacent the second end of said shank. said anterior side of said head includes a bearing surface and a convergent transition portion, said bearing surface extending inwardly from an outer radius edge adjacent said head periphery to an inner radius edge, said convergent transition portion extending inwardly from a large end adjacent said inner radius edge of said bearing surface to a small end adjacent said second end of said shank, said convergent transition portion having an outer surface that extends between said large end and said small end, and said at least one ridge formation extending across said outer surface of said convergent transition portion, wherein the bearing surface defines a reference plane that is substantially parallel to the transverse plane; wherein the shank has a smooth outer surface along its full longitudinal extension from the first end until the inboard end adjacent the second end of said shank.