Key Stock, System of Measurement Inch, Material Steel, Material Grade/Class Grade 1018/Grade 1045, Finish Zinc Plated, Height 9/16 in, Thickness Tolerance +0.000/-0.002 in, Length 3 ft, Length Tolerance +0.000/-0.125 in, Width 9/16 in, Width Tolerance +0.000/-0.002 in, Pack Size Small Pack, Made in North America Yes, Properties , Key Shape Straight, Rockwell Hardness HRB 50, Features , Tensile Strength 70,000 psi, Manufacturer Location Made in USA*