This is a floor-mounted bracket holder intended for the Anker Power Strip model A9191. It uses 4 screws with a width of 4 millimeters, which is a standard screw size. This model requires no supports and is printed as two brackets, one for the front and one for the back. The brackets are interchangeable, so there is no distinct front bracket or rear bracket. The 3MF file includes a model file with negative screw objects, another model file with pre-drilled screw holes, and yet another file containing all modifiers, allowing you to adjust their depth, size, and shape in the Bambu Studio slicing software before removing them.