Key Stock,12 in L,SS,5/16 in W, System of Measurement Inch, Material Stainless Steel, Material Grade/Class 410, Finish Plain, Height 5/16 in, Thickness Tolerance +0.000/-0.002 in, Length 12 in, Length Tolerance +0.000/-0.125 in, Width 5/16 in, Width Tolerance +0.000/-0.002 in, Pack Size Small Pack, Made in North America Yes, Key Shape Straight, Rockwell Hardness HRB 86, Features Mildly Magnetic, Tensile Strength 40,000 psi, Manufacturer Location Made in USA*, Material Quality Standards ASTM A582 Form, forge, or machine a key with this undersized key stock. It is marginally smaller than the stated size for a looser fit. It does not require filing.