Step Key Stock Base Height 0.188 in Material Steel Material Grade/Class Grade 1018 Finish Zinc Plated Length 12 in Length Tolerance +0.000/-0.125 in Overall Width 0.563 in Overall Width Tolerance +0.000/-0.003 in Step Height 0.25 in Step Height Tolerance +/-0.005 in Step Width 0.5 in Step Width Tolerance +0.000/-0.003 in Straightness Tolerance Not Applicable Standards RoHS Compliant Pack Size Small Pack System of Measurement Inch Key Shape Step Rockwell Hardness B85