Designed for simple assembly, these rollers and hooks save time and effort, for enthusiasts and renters without professional tools This 20 piece set fits various skylights models, offering flexible installation option for both residential and commercial buildings, solving compatibility issues with ease Make of and stainless steel, these rollers ensures quiet and smooth movement along the track, eliminating common issues like jamming and noise, perfect for bedrooms and study rooms The stainless steel hooks feature excellent anti rust properties, enhancing longevity in humid environments such as coastal areas or bathrooms, addressing metal concerns The components, catering to households and businesses while reducing environmental impacts, Manufacturer: Oxxggkao