Swanson T0108 Big 12 Speed Square Layout Tool with Blue Book<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Heavy gauge aluminum with matte finish to prevent glare</li><li>1/4 in. and 1/2 in. spaced notches to facilitate scribing lines</li><li>Plain gradations</li><li>Includes 60-page Swanson blue book of instructions</li><li>Great for deck framing and stairway building!</li></ul></div><img src="http://ecx.images-amazon.com/images/I/51QV2viKgpL.jpg" noproxy>