Restricted upvc Window Hinge
Restrictor stays hinges prevent windows opening to approx 100mm to provide child safety as they help prevent falls from heights. Restrictor hinges can be over ridden by depressing the button by a responsible person which then allows full opening for ventilation or cleaning purposes.
Even if the hinges are of a different make they will work perfectly as long as you choose the same length and stack height. We always advise changing both stays at the same time and is why we always sell them in pairs as even if one is ok it will break down in time.
How to Identify The Handing on a UPVC Window Stay Friction Hinge:
Not sure how to change a window friction hinge? then read our guide: How to fit a window hinge