This kit includes 2 standard corners and 2 reverse corners that allow you to modify the frame around larger spill boxes, light mounts, cables, piping, etc. that are not covered by the Multi-Cut-Out kit.
Each set contains:
1 pair of standard corners
1 pair of inverted corners
Note:
Cutting into the standard rectangular frame, especially for larger frames, generally reduces stability. It is recommended to install one or more cross braces as needed.