Milwaukee Tool 12 in. Magnum Aluminum Rafter Square
The Milwaukee Tool 3990 Magnum 12-inch rafter square is built for framing carpenters, roofers, and contractors who need accurate, fast layout capability in the field. Machined from aluminum for lightweight durability, the square delivers reliable angle readings for common rafters, hip and valley rafters, and stair stringers. The large 12-inch size provides an extended reference edge for increased accuracy on larger stock.
Features
- 12-inch size for extended reach on large dimensional lumber
- Aluminum construction for lightweight, corrosion-resistant durability
- Stamped degree scale and rafter tables for fast field calculations
- Silver finish for high-visibility scale reading
- Suitable for framing, roofing, stair layout, and general carpentry
Specifications
| Specification | Value |
|---|---|
| Model | 3990 |
| Size | 12 in. |
| Material | Aluminum |
| Color / Finish | Silver |
| Product Type | Rafter Square |
| UPC | 01581203990 |



