This listing is for Fifty (50) new 1/16" - Imperial (Inch) - Short Arm Hex Key / Allen Wrench.  Hex Key is about 1-3/4" long.

Black Alloy Steel - Made from 6150 CRV heat treated alloy steel. Best for applications where extreme strength and hardness are required.

Min. Tensile Strength (MPa): 1200 !!

Complies with highest ANSI / ASMEb18.3.2m Standards for strength and Dimensions.   Perfect for Class 12.9 cap screws!!