The StairFlex railing fastener allows you to easily mount stair gates on railings without a suitable clamping or screwing surface. Thanks to the Power2Fix bracket, you can easily and safely attach your door grille to the railing without damaging it. The bracket is suitable for railings with an inner bar spacing of approx. 50-115 mm, round posts with a diameter of approx. 45-120 mm or square posts with a diameter of approx. 44-107 mm. This mounting is suitable for all reer railings as well as for a variety of child safety rails from other manufacturers.