Tool Steel Flat Stock Steel Material Width 3/4 in Thickness 1/16 in Fractional Size 1/16 in x 3/4 in x 36 in Finish Unfinished Length 36 in Length Tolerance +0.250 to +0.500 in Hardness Scale 221 to 225 BHN Grade D2 Standards ASTM-A681 FED-QQ-T-570 SAE-J-437