U-Shaped clip made from strip material

In a U-shaped clip made from substantially flat strip material and intended to close bags and flexible tubes, said clip comprising a web connecting two limbs having outwardly angled end lugs, the improvement which comprises providing on the surface of the clip which is to engage a bag a pair of spaced parallel beads extending longitudinally along the outer edges of the web and limbs, the material forming said beads being displaced inwardly from the outer longitudinal edges of the strip, and also providing in the surface of the clip which is to engage a bag a plurality of longitudinal parallel grooves in each limb and in the web, the grooves being discontinuous in that they are absent at the joinders between the limbs and web, the clip face opposite the grooved face being substantially flat, whereby such beads and grooves serve to grasp the bag more securely.