The Empire 12 in. TRUE BLUE Combination Square features precision machined working surfaces and a head with rational dimensions for a quick check of common measurements. The Combination Square features the BLADE-LOCK self-aligning drawbolt which allows users to make quick adjustments with a secure hold. The DUAL-PITCH TRUE BLUE Vial allows users to easily check level, one-, and two-degree slope. The 12 in. etched stainless steel blade will not fade over time and features high-visibility markings. This Combination Square also features onboard storage for a hardened scriber.