Free 3D Printable Garbage Disposal Installation Aids A garbage disposal installation tool 3d print can give you downloadable, custom-fit helpers for common under-sink tasks. The most useful files are usually supplementary aids, not replacements for the heavy-duty tools needed to hold or tighten a disposal. Snap-ring and mounting helpers: Assist with positioning parts around the sink flange. Wrench holders: Keep the disposal's jam-clearing wrench mounted inside the cabinet ins