Dargan 12" Combination Square Heavy-duty Stainless steel blade Imperial & metric markings Adjustable straight edge Depth gauge Self-aligning draw bolt Dargan 12" Combination Square This is a multi-use measuring instrument that is primarily used for ensuring the integrity of a 90° angle, measuring a 45° angle, measuring the center of a circular object, find depth and simple distance measurements. It can also be used to determine level and plumb using its spirit level vial. They're also handy for a different project and tool-setup applications–does far more than just help you draw perpendicular lines. Features Clear bubble vial 12-inch heavy-duty professional combination square with an etched stainless steel blade Combination square has a stainless steel blade has a matte finish that will never rust or corrode Self-aligning draw bolt; hardened scriber; heavy-duty machined square head