Thank you for having them! It's OEM aside from a new improvement over my existing transmission opener; They have a plastic square washer glued on to prevent the entire mechanism from tearing causing the screw gear to slip or fall out which happened on my original. To cushion any splitting, I applied glue (JB Weld) to the seams and around the plastic washers. Now they will never open! The replacement was quick, less than 2 minutes and the blinds were like new again. Our blinds are 2 inch wooden blinds with a square stem.