✕DO NOT FORCE THE FIT
- This is the load-bearing warning.
- A stiff, bevel-free blade cannot bow to feather joint compound and has no ground edge to strike a coat level — it will leave ridges and pull mud out of depressions instead of filling them.
- For tape, fill, and skim, its flexible one-piece sibling the 06879 is the correct tool; the 06880 and 06879 look related and are opposite tools.
- It is also not a paint scraper (no bevel to lift material) and not a trim-cutting tool (use a knife against a broad blade or shield for that).