Woodruff Key Assortment, System of Measurement Inch, Material Steel, Material Grade/Class Grade 1018/Grade 1045, Finish Plain, Thickness Tolerance +0.001/-0.000 in, Length 1.24 in, Length Tolerance +0.000/-0.100 in, Width Tolerance +0.001/-0.000 in, Number of Pieces 600, Number of Sizes 24, Manufacturer Location Globally Sourced