The 'GW' range is designed for indoor or outdoor applications with a maximum span between switches of 100M. All items operate using a 'taut wire' system which is pulled to initiate a 'Stop' function.
The grabwire switches are sold individually and the only other component required to complete an
installation is a 'Pull Wire' kit. These are sold in various lengths and contain the pull wire, all parts required to make-off the wire at both ends and sufficient eyebolts to support the wire at 2M intervals.
The ideal installation would have a grabwire switch at both ends of the pull wire; this will require electrical connections at both ends. Anchor boxes are available where electrical access is only available at one end.