a twist drill or drill / chamfer tool that comprises a drill with a shaft section . the shaft section is provided with a twisted flute and a clamping ring as the retainer of a facing cutter . the clamping ring tubularly encloses the shaft section or the drill shaft and can be fixed on the shaft section or drill shaft in different axial adjustable positions . the clamping ring can be tensioned on the drill with tension screws that extend through the clamping ring substantially radially to the axis of the drill . the tension screws impinge the surfaces of the twisted flutes , which twisted flutes are enclosed by the clamping ring indirectly with a clamping shoe that is interposed in a twisted flute .