The Model Number Is Right There
"2990" and "Patent No. 5901445" are stamped directly into the aluminum — not a sticker, not a box label. It's a 7" rafter and speed square with the full common-rafter conversion chart etched into the face, so the math is on the tool itself.
This is the square our founder actually reaches for on a job site — pivot point, scale, and conversion chart have all seen real use, not a shelf.
- Made in Mukwonago, Wisconsin since 1919
- Common rafter conversion chart etched into the face
- Pivoting fence for angle and hip/valley cuts
Empire Level's own site states it has been "manufacturing precision measuring and layout tools" from its Mukwonago, Wisconsin facility since 1919. Read the source on empirelevel.com → Retrieved 2026-10-02. The 2990 model number and patent number are stamped directly into our founder's own square, visible on camera — this is his exact tool, not a lookalike. That specific vintage model isn't carried on Amazon, so the linked listing is the closest current equivalent in the same Empire rafter-square line.