Excellent QualityHigh quality sturdy structure, high quality stainless steel floor rails to ensure strength and durability; Rollers made of high quality POM material, sound-absorbing, anti-slip and noise reduction design. AdjustableAdjust at will, the distance between the two rollers meets your needs. After adjusting the screw, it can work smoothly and quietly. Flat bottom design Level it to a new smooth surface, the flat bottom design makes the door unnecessary for slots and won't damage your beautiful floor. It is durable and operates smoothly for maximum efficiency and quietness. Easy to UseInstalled on the wall with screws, no door groove required. Adjust the position of the rollers on the track according to the door panel. No need to drill holes in the floor and it looks great indoors and outdoors.