shown in fig1 a sleeve 163 can be placed about the upper portion of shank 162 and clamping bosses or ledges 157 formed at the entrance to slot 156 the material of sleeve 163 and ledges 157 are for example relatively resilient and ledges 157 serve to narrow the lateral area across slot 156 so as to somewhat resist but not completely prevent passageway between slot 156 and slot 154 thus once the user or shipper places handle 170 into the non use position shank 162 is retained in slot 156 until the user affirmatively moves shank 162 out of that slot ledges 163 being formed to prevent movement of shank 162 out of slot 156 without application of additional motive force by the user the hinge arrangement between the sections of tonneau cover 20 can be used to automatically stretch and tighten cover sheet 28 when the sections are unfolded and extended over the cargo bed for example as shown in fig1 the side rails of each section are joined by hinge member 80 having two pivot pins 82 and 84 mounted in brackets 86 and 88 respectively spacer 90 is mounted between brackets 86 and 88 and held in place by the pivot pins thus when the sections are folded to overlay one another cover sheet 28 folds with a curved portion 92 rather than a sharp crease when the sections unfold that curve is stretched flat to provide the tension to tighten cover sheet 28 although the present invention has been described in detail above with regard to specific embodiments the same has been for illustration and example only not all of the features of preferred embodiments need to be employed in every embodiment for example the.