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Featuring impressive thermodynamic properties, the D 8-FV is a unique fastener for use with insulation materials of all thicknesses. Thanks to its innovative double-helix spiral design, this anchor cuts its way effortlessly into expanded polystyrene and mineral wool insulation sheets. It also ensures optimum thermal isolation by reducing thermal bridging to the lowest physically possible level. The D 8-FV anchor and the special setting tool function together in a unique way, resulting in the simplest screw anchor system on the market. Installation of the anchor is very straightforward and, due to its design, only one length is required.