This is the base to attach anything to Ikea Bror Shelf. I used it to attach parametric Broom Holder for my Cyclone Vacuum Bosch Hose. You need 2x M5x16-20 screws and M5 nuts and 2x M4x12 screws and nuts. I use 33mm custom Broom Holder that I also include This is a remix of several models. https://www.printables.com/model/329939 https://www.thingiverse.com/thing:2029895