As a replacement: These rigid clicksur fasteners with 3 links (or suspension spring) are ideal for replacing a broken fastener inside your roller shutter box. The fastener makes it possible to establish the link between the winding tube and the apron: it clips to the first blade of the apron and winds at the same time as the latter around the shaft. No need to screw: the Clicksur 3-link rigid fastener is attached to the winding tube, by a clip or staple system. So no need to drill or screw the rotation shaft. A simple and effective alternative. A guarantee of safety: The suspension springs improve the protection of your fireplace compared to a standard attachment system or soft ties. Increased security for your window thanks to this high-quality product made in France. Compatible with different systems: These spare parts for roller shutter are suitable for different roller shutter systems: motorized, manual, or even with strap, with aluminium or PVC blades of 8 mm mini and max. Suitable for trunks and axles with wired (or electric) motor, or radio. Contains a 3-link Clicksur rigid fastener, for a maximum allowable load of 7kg per lock. Suitable for winding tubes with a diameter of 235 to 250 mm. The attachment is done by clips on a ZF tube (or wire attachment) or by screw or pop rivet on other tubes., Manufacturer: zurfluh-feller