Combination Square, Number of Pieces 2, Blade Finish Brushed, Blade Material Steel, Head Length 3 in, Head Width 9/16 in, Blade Length 11 13/16 in, Blade Thickness 0.08 in, Blade Width 3/4 in, Graduation Mark Style Etched, Graduation Marks - Front 1 mm, Head Type Square, System of Measurement Metric, Head Material Cast Iron, Head Vial Included Yes, Accuracy +/- .0025 in, Features Reversible Lock Bolt, Graduation Color Black, Graduation Scale 35, Graduation Units Millimeters, Head Color Black