The Empire® 150 mm True Blue® combination square (E255M) 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 high-visibility e-Band™ vial allows easy level checks. The 150 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. BLADE-LOCK™ for fast adjustment and secure hold Precision machined working surfaces e-Band™ Vial Rational head dimensions Cast zinc head Stainless steel blade Scriber High visibility markings Made in the USA with global materials Limited Lifetime Warranty (1)150 mm True Blue Combination Square(E255M)