Features and Benefits:BLADE-LOCK for fast adjustment and secure holdPrecision machined working surfacesDUAL-PITCH Vial for checking 1 and 2 degree slopeRational head dimensionsCast zinc headStainless steel bladeScriberHigh visibility markingsMade in the USA with global materialsLimited Lifetime WarrantyThe Empire 12 in. True Blue combination square (E250) has precision machined working surfaces and a head with rational dimensions for a quick check of common measurements. The square has the BLADE-LOCK self-aligning drawbolt allowing quick adjustments with a secure hold. The DUAL-PITCH True Blue vial allows easy checks for level, one-, and two-degree slope. The 12 in. etched stainless steel blade will not fade over time and has high-visibility markings. The Combo square also has Onboard storage for a hardened scriber.