Woodruff Key,1 in L,0.25 in W,PK25, Length 1 in, Length Tolerance +0.000/-0.010 in, Material Steel, Material Grade/Class Grade 1035, Finish Plain, Height 0.438 in, Width 0.25 in, Width Tolerance +0.000/-0.001 in, Rockwell Hardness B80, Tensile Strength 72,000 psi, Made in North America Yes, Manufacturer Location Made in USA*, Pack Size Small Pack, Material Quality Standards ANSI B17.2, Key Shape Woodruff, Key Type Bilateral, System of Measurement Inch, Package Quantity 25