This 14 Piece 3/4" Drive 6 Point SAE Impact Socket Set by Armstrong features radius corner design that engages the flats of the fastener, not the corners, providing up to 15% - 20% more torque while reducing fastener rounding which helps enhance the turning of worn fasteners. The socket wall dimensions are optimized to provide strength while retaining access to restricted fasteners. EYE-D™ markings optimize size visibility while also providing SAE / Metric differentiation. Manufactured from high alloy steel using the most up-to-date manufacturing process and heat treat for greater strength and durability. Meets or exceeds ASME B107.2-2002 and US Federal GGG-W-660A specifications.