Armstrong 22-242D 1-Inch Drive 6 Point Deep Impact Socket, 1-5/16-Inch Made in the USA - quality and availability Radius corner design engages the flats of the fastener, not the corners, providing up to 15-Percent -20-Percent more torque while reducing fastener rounding, enhancing the turning of worn fasteners Socket wall dimensions are optimized to provide strength while retaining access to restricted fasteners Manufactured from high alloy steel using the most up-to-date manufacturing process and heat treat for greater strength and durability Proudly made in the USA with a lifetime warranty