This is a customizable LCD bezel trim. It makes a friction fit bezel that fits between the gap of a housing and a lcd display. You can set the thickness and border of the bezel, the depth and thickness of the mounts, offset of the display area and mount, and it can handle protruding and receded displays.
After struggling with another LCD bezel .stl I found here not fitting my Anet A8, I decided to just make my own. This is a good way to check the dimensional accuracy of your printer too. Mine ended up being spot on vs my real world measurements (All those belt adjustments are finally paying off with a first time fit!). The example values and .stl are for my Anet A8, mine is one with the newer dimensions.
Still haven't figured out why the customizer is all garbled. Works in OpenSCAD.