023-56080 Allen offers the broadest line of fractional (SAE/Inch) and metric hex keys and sets in the industry. When you need a hex product, think Allen, the original manufacturers of the Allen brand wrench. Product detail set size range min set size range max 3/8 SAE/Metric SAE set included storage plastic caddy ball plus ball end. Features: -Short arm hex key set. -13 Pieces per set. -Material: Alloy steel. -Length group - short. -Precision formed to exact tolerances for precise fit. -Resists rotational distortion. -Measuring system - inch. -Includes pouch. -Tip size: 0.05", 1/16", 5/64", 3/32", 7/64", 1/8", 9/64", 5/32", 3/16", 7/32", 1/4", 5/16", 3/8", 0.05" [Min], 3/8" [Max].