A high strength multiple-use cable tie (1), formed in a ladder-shaped construction comprising two substantially linear side rails (2) of generally uniform cross-section. These rails are interconnected by a plurality of closely spaced curved or chevron rungs (3) which define between them similarly shaped apertures (4). The free end (51) of the strip can readily pass through an aperture in a forward direction and form a closed loop, but when pulled in the reverse direction, the rungs engage to form a co-operative latch and thereby prevent withdrawal.