Abstract: A dual purpose razor blade comprising a substantially V-shaped detachable gauge attached to a disposable shaving razor. The gauge comprises two inclined surfaces creating a lip. The lip has a plurality of openings going thorough it creating a comb-like effect. The blade is positioned in close proximity to the openings in the lip, wherein the line of the blade is substantially parallel to the lip and further positioned substantially in the middle of the openings. Whenever the lip of the gauge is stroke against hair, only the hair that enters the openings meets the blade and is consequently being cut. Thus hair thinning effect is achieved. Detaching the gauge leaves the user with a regular shaving razor, both shaving and hair thinning in the same device.