Allen 56182 13 Piece SAE Ball Plus Screwdriver Handle Hex Key Set,Cooper Tools,56182" /> Made in the USA - Quality and Availability From Allen, the Original Manufacturer of the Hex Key Ball-Plus Hex Drivers Permit An Entry Angle Up to 25Degree to Work in Hard-To-Reach Areas. 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