Woodruff Key, 1 in L, 0.1875 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 0.1875 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 B 17.2, Key Shape Woodruff, Key Type Bilateral, System of Measurement Inch, Package Quantity 25