Allen 56009 Long Arm SAE/Metric Hex Key Set, 22-Piece Heat treated, tempered alloy steel provides high strength and resistance to rotational distortion All hex keys are precision formed to exact dimensional tolerances for precise fit Proudly Made in the USA by Allen, manufacturers of the original Allen hex key wrench Tool set includes hex keys to fit most common sizes of fasteners Extra key length provides for greater access to hard to reach fasteners