Machine Key, Length 12 mm, Length Tolerance +0.000/-0.200 mm, Material Steel, Material Grade/Class Ungraded, Finish Plain, End Profile Square, Width Tolerance +0.000/-0.030 mm, Head Height 4 mm, Key Type Undersized, Tensile Strength 91,000 psi, Standards RoHS Compliant, System of Measurement Metric, Key Shape Straight, Height 4 mm, Width 4 mm, Rockwell Hardness C15, Made in North America Yes, Manufacturer Location Made in USA*, Pack Size Small Pack, Package Quantity 25