Oshlun MTM-CSHQ 12-Inch Professional Combination Square Set Set Includes: 12-Inch Stainless Steel Rule, Protractor Head, Square Head, Center Head, Scriber, and Storage Case Ruler Graduations Laser Etched in 8ths, 16ths, 32nds, and 64ths Direct Reading Double 180 Degree Protractor Scale Hardened Cast Iron Steel Heads with Reversible Lock Bolts Spirit Level on both Square and Protractor Heads