Abstract: An apparatus is provided for trimming and thinning hair through the maximum utilization of the slicing capacity of a straight razor. By employing a triangular, dualistic blade and comb configuration, the device channels and cuts the hair with an oblique, slicing motion without pulling or resisting the hair in any way. The device is comprised of a triangular body unit with two side walls, each extending the length of one of the longer body edges and raised vertically from the body. These walls form closed housing, each of which shelters a razor blade. In from of each razor is a series of combs which channel the hair evenly into the blades. The triangular shape of the device acts as a further channeling means, bringing hair into the wide end, through the combs to the blade edges and then out the narrow back end.