"Ball end hex keys save time by allowing you to insert the ball end into the screw head quickly, from up to a 25 angle, even when working in blind locations. You'll find ball end tools work efficiently, even near obstructions. High-quality machining means smooth rotational action, extended tip life and reduced fastener wear. Ball end tools are made of Protanium high torque steel, which is up to 20 stronger, with more torque and twice the wear resistance of standard grades of steel. Protected with ProGuard corrosion-resistant finish. U.S.A. Long arm length 10.2in. 259mm"
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