for selective embedded engagement with the plurality of catch teeth 3 the stop catches 12 are biased in the position shown but are movable in a direction transverse to the longitudinal axis l l of the strap element 2 as shown in fig2 and 3 the stop catches 12 are carried on cross pieces 20 the cross pieces 20 are disposed adjacent a bearing area 15 formed by the bearing region 6 the bearing area 15 adapts the bearing region 6 to be mounted or otherwise connected to an operatively associated support member not shown with continued reference to fig2 a pair of longitudinal guideways 22 are carried on a pair of cross pieces 20 for guiding the strap element 2 through an aperture formed in the bearing region 6 in the preferred embodiment illustrated in the figures two stop catches 12 are employed by the present invention and are arranged at a pair of cross pieces 20 on opposite sides of the aperture formed in the bearing region as shown when the subject retainer strap is manufactured a breakable hinge member connects the bearing region 6 to the strap element 2 the breakable film hinge member 10 is adapted to be selectively severed during the process of installing the subject retainer strap according to the invention the breakable hinge member 10 connects the bearing region 6 to the elongate strap member 2 to prevent relative movement between the bearing region and the strap element when the hinge member is broken and placed in a severed state relative slidable movement between the elongate strap element 2 and the bearing region 6 is enabled since the holding region 4 is carried on one end of the strap element 2 the relative movement.