Machine Key, Length 3 in, Length Tolerance +0.000/-0.030 in, Material Steel, Material Grade/Class Grade 1018/Grade 1045, Finish Plain, End Profile Round, Width Tolerance +0.002/-0.000 in, Head Height Not Applicable, Key Type Oversized, Tensile Strength 64,000 psi, Standards RoHS Compliant, System of Measurement Inch, Key Shape Round, Height 1/2 in, Width 1/2 in, Rockwell Hardness B50, Made in North America Yes, Manufacturer Location Made in USA*, Pack Size Small Pack