Machine Key Assortment System of Measurement Inch Material Steel Material Grade/Class Ungraded Finish Plain Thickness Tolerance +0.000/-0.002 in Length 1.5 in Number of Pieces 70 Number of Sizes 6 Manufacturer Location Made in USA Includes (10) 1/4x1/4 in (12) 3/16x1/4 in (12) 3/16x3/16 in (20) 1/8x1/8 in (8) 3/8x3/8 in (8) 5/16x5/16 in Plastic Compartment Box with Lid Chart Product Type Machine Key Assortment Key Shape Straight Rockwell Hardness B80/90