Made in the USA - quality and availability Box ends incorporate a radius corner design that engages the flats of the fastener, not the corners, providing up to 15% -20% more torque while reducing fastener rounding, enhancing the turning of wor Box ends are offset a true 15° for clearing obstructions and knuckle clearance on flat surfaces Forged from premium alloy steel Precision broached for a perfect fit Prevents fastener rounding and increases torque strength by using an off-corner load design Proudly Made in the USA Proudly made in the USA with a lifetime warranty