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