Stable Load Bearing: Integrated structural design fits closely with window frames and avoids loosening during opening and closing while keeping steady movement to match window hinges Easy Installation Fit: Precisely reserved standard mounting holes come with complete matching parts for quick alignment and fixing on window frames which lowers assembly difficulty Smooth Silent Operation: Special surface treatment reduces friction resistance to ensure unobstructed rotation without harsh noise delivering soft opening and closing effect Wide Window Compatibility: Suits casement top hung and side hung window styles with standard hole spacing fitting regular window frames allowing direct replacement of old fittings Weather and Corrosion Resistance: Professional surface isolation blocks wind rain and moisture erosion adapting to changeable humid outdoor balcony environments and maintains stable moving state, Manufacturer: DASJKDI