COMBO SQUARE: This Johnson combination square has a heavy-duty high-impact molded reversible head. STAINLESS BLADE: This combination square has a stainless steel blade with 1/8", 1/16", 1/32" and millimeter graduations that are permanently stamped so they will never fade or degrade. ACCURATE MEASUREMENTS: The Auto-Lock blade assembly ensures precise alignment for optimal tool performance. APPLICATIONS: From carpentry to stone masonry to metal working, this square comes in useful for a variety of projects and tool-setup applications. PRODUCT SPECIFICATIONS: Accurately measure 45° and 90°, mark miter cuts and find depth as well as simple distance measurements. Built-in level vial for checking level and plumb.