Sash window security stop set.
Window can be locked closed, or locked in open position for ventilation. We would suggest second ferrule height of between 75 - 100mm from rail.
Set includes two security studs and four ferrules
Countersunk ferrule provides a flush finish.
Finishes available to match other ironmongery finishes or choose white to blend the security stop into the window finish.Ferrule is open both ends to avoid moisture issues often encountered with fittings to external doors and windows.