Features and Benefits:•BLADE-LOCK™ for fast adjustment and secure hold•Precision machined working surfaces•DUAL-PITCH™ Vial for checking 1 and 2 degree slope•Rational head dimensions•Cast zinc head•Stainless steel blade•Scriber•High visibility markings•Made in the USA with global materials•Limited Lifetime WarrantyThe Empire® 400 mm True Blue® combination square (E280M) 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 for easy check for level, one-, and two-degree slope. The 400 mm 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.