This 12 Inch divider/compass is made from high-grade carbon steel and has hardened and finely ground points as well as a universal pencil holder. The hardened tips will scribe easily in both wood and metal. It has a black powder coated finish to resist corrosion. It features an easy adjust nut for rapid and precise fine adjustments that will securely hold any measurement. The robust “Yankee” style flat-leg construction makes the unit very durable. It has a burnished and hardened spring for years of service. Leg length is 12 Inches, overall length is 14 Inches, leg thickness is 0.160 Inch and overall opening is 12 Inches.