The Empire® 12 in. / 300 mm True Blue® combination square (E250IM) 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. / 300 mm etched stainless steel blade will Nt fade over time and has high-visibility markings. The Combo square also has Onboard storage for a hardened scriber.