Johnson's 16" x 24" arc angle framing square is everything a builder needs to get their work done quickly, efficiently and accurately. Features scribe notches for rough layout of arches in doors and windows, holes for mechanical piping or general layout of arcs and circles.  It includes graduations in 1/8", 1/10", 1/12", 1/16" and 1/100", as well as octagon scales, rafter tables, and brace tables, making it useful for any number of different jobs. This framing square's aluminum construction makes it conveniently lightweight while also keeping the tool safe from rust.
- Hi-visibility EZ-Read™ laser etched graduations and numbers measure in 1/8", 1/10", 1/12", 1/16", 1/100" 
- Black anodized aluminum with low-glare matte finish 
- Easily scribe arcs and circles 
- Accurately mark from 14"-21" radius in 1" increments using featured scribe notches and pivot point 
- Includes octagon scales, rafter tables and brace tables