Abstract: In the case of a device for fastening of at least one exchangeable elongate slide insert (5), in particular synthetic plastics material slide inserts, in recesses of a slide base or ribbed plate (4), in which the side surfaces of the slide insert (5) are at least partly gripped by inwardly-sloping or undercut walls of the recesses, the slide inserts (5), on their underside and transversely to their longitudinal axis, have a straight-line groove, in which case the slide base or ribbed plate (4) on its upper side has a groove open towards the top in alignment with the groove in the insert, and the groove in the slide base or ribbed plate (4) and the groove in the slide insert (5), in the locking-in position, define a clear opening for the insertion of a rod-shaped locking-in member (7), the free ends of which project, in a plastically deformable mariner, beyond the edges of the slide base or ribbed plate.