These support brackets can be used if you have a camper van, RV, caravan etc to hold back your stuff in any open shelves. Each bracket has a clip that can be opened so that the bar can be removed when you get where you are going, then replaced and closed back up securely when you get back on the move.Print out two brackets and two rings. Clip the ring onto the bracket. Screw the pair to each side of the shelf and place a length of 6mm aluminium rod into each bracket, then close the clips to hold secure. Repeat depending on height of shelf.If you are going to use the scad file, the bracket and the ring are both modules in the file, so edit the bottom to setup which of the two items you want to export, or if you want multiple copies use translate as I've shown in the comments.