The present invention relates to a clamping sleeve for clamping a cannulated drill and a guide wire for medical purposes, wherein the clamping sleeve can be introduced into the chuck of a drilling machine, comprising: at least one drill contact area which protrudes into the interior of the clamping sleeve in order to clamp the cannulated drill, through which the guide wire runs, when a force acts inwards on the outer side of the clamping sleeve; at least one wire contact area in order to clamp an exposed part of the guide wire which is not enveloped by the cannulated drill when the force acts inwards on the outer side of the clamping sleeve; wherein the at least one wire contact area and the at least one drill contact area lie sequentially in the longitudinal direction of the clamping sleeve.