These were helpful for making small adjustments to the length of curtains. There are three items for sale, but it's possible to increase the quantity. Up to 5 pieces are available with no additional charge, so please comment before purchasing m(_ _)m Length: 80mm Adjustment: Approximately 5mm per notch, adjustable by approximately 50mm [How to Use] Place this item in the direction shown in photo 2, and adjust by sliding the curved part on the right side of the photo downwards.