The #MG-S281-4R Combination Square with Locating Device can determine 90° and 45° angles and measure distances up to 1 ft./305mm. It's a favorite of toolmakers and machinists.

• Patented locating device automatically positions all heads for quick assembly
• Hardened square and center heads, with double-shoulder reversible beveled protractor head
• Clamp screw assembly is replaceable (#MG280/281-CA)
• Square head has spirit level and hardened scriber
• Etched, high-carbon blade with satin chrome finish
• Meets U.S. Government Specification GGG-S-656C