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. PRODUCT DETAILS 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 SPECIFICATIONS Warranty 1 Year Warranty APPLICATION Our arc angle framing square is a must-have for any carpenter or builder - it is handy for framing, layout, rafter and stair work, finding and establishing right angles, marking cut-off work and more! Features scribe notches for rough layout of arches in doors and windows, holes for mechanical piping or general layout of arcs and circles. The EZ-Read™ low-glare coating makes this tool particularly useful in bright sunlight conditions, as it eliminates glare.