This is a parametric shelf bracket. The screw holders are printed separately to prevent the brackets from splitting if the screws are overtightened. The example provided is designed for #8 wood screws, 1.5 inches in length, and a shelf depth of 5.5 inches.
Support material touching the build plate is required. An infill of 30% is recommended.
This object's main web page is: https://www.ctheroux.com/parametric-shelf-bracket/.
This object was designed using openSCAD.
The author marked this model as their own original creation.