Swanson Tools The Big 12 Speed Square, 12 in L, Heavy-Gauge Aluminum Alloy (698-S0107)
$29.37
7 tools-in-one - framing square, try square, miter square, protractor, saw guide, with layout bar stair guide to determine out-of-square corners 1/4 in spaced notches to facilitate scribing lines Black-filled markings with layout bar and blue book