Compatibility: The tube sleeve adopts a spring piece structure design, allowing the head-making kit to accommodate a greater tolerance of the rolled tube Experience: The metal core braking technology with built-in helical gears is adopted to further enhance the experience of the roller shutter. Luxury feel: The use of screw-hidden electroplated aluminum alloy installation codes gives the roller blinds a different kind of luxury feel Application specifications: Maximum load capacity 6kg, suitable for roller blinds of 6 square meters or less. Built-in 1:1.5 reduction ratio, saving more than 30% of effort.