Apex Ball End Hex Bits are manufactured using a proprietary steel and heat treat process that yields greater strength and a longer bit life. The cutting-edge machining process used to manufacture Apex Ball End Hex Bits results in tighter tolerances, superior product consistency and a better and more consistent fit to fasteners leading to better torque transfer.The Ball End Hex Bit is one of the most common screw drives in not only the aviation industry, but the automotive repair, technology and heavy industry sectors. The Apex brand has always stood for quality design and is constructed to last longer than cheaper alternatives.