The utility model is aimed at increasing the working life, the engraving depth, reducing weight of the device, and to increase productivity. The technical result is achieved in that the device comprises a body with a diamond or carbide tip, the vertex of which lies on the longitudinal axis of symmetry of the housing, provided with a cylindrical shank. The housing consists of a cylindrical extension, which is the ratio of the diameter to the diameter of the cylindrical shank is 1: 1, and the cone-shaped part constituting a single unit. Between the cylindrical shaft and the cylindrical extension is arranged a thrust ring of 1-2 mm and a diameter equal to the diameter of the conical base of the housing. The tip is formed as a regular pyramid with equal apex angles sharpening. 1 Fig.
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