adjustable zipper

Made adjustable zipper for different applications. By pressing the middle part, you can have a 360-degree rotation to find the ideal position.It can be used to make notebook tables or lamp stands or other uses. It consists of 3 printable parts and for operation it is necessary to insert a spring inside. I thank in advance all those who will download the product and I would like to see an image of the project on which it was used.