Abstract: A device for the clamping of cutting inserts for cutting metal machining. The device includes a mainly straight locking screw, which is threaded through a through center hole in the cutting insert and is threaded firmly into a threaded boring in a cutting insert seat intended for accommodating the cutting insert. The cutting insert seat is provided in a cutting insert holder body, such as a turning bar, a milling cutter body or a drilling tool. The head of the locking screw is chamfered in at least two places to enable the cutting insert to be stepped over the locking screw head when the screw is screwed upwards a predetermined number of revolutions. Thus, the present invention eliminates the need for the screw having to be detached from the threaded boring in order to remove the cutting insert.