Johnson RAS-170B-ORA 12" Structo-Cast Rafter Square
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- Durable, light weight Structo-Cast® high-impact molded frame
- Permanent molded graduations for quick and easy measurements
- 2x4 board dimension markers for measuring 1-1/2", 3" and 3-1/2"
- Thick edge is useful as a saw guide
- Built-in scribe notches