Holding element for a device for supporting and / or guiding

The invention relates to a holding element (60) for a device for supporting and / or guiding a machine tool (20) or a workpiece (W)， the device comprising a contact body (40) with a contact surface (42) for contacting a work surface (H). a workpiece (W) or a wall. It is provided that the holding element (60) has an adhesive (70) for adhering to the work surface (H) and a fastening means for a detachable hold on the contact body (40)， the fastening means having at least one form-fitting contour (90) for a form-fitting Hold on a holding element receptacle of the contact body (40).