The Grainger 14N993 is a Westward brand 1/4-inch drive socket adapter that converts a 1/4-inch square drive to a 3/8-inch square drive. It is made from chrome vanadium steel for durability and has a black oxide finish to resist corrosion. This socket adapter allows you to use 1/4-inch drive tools with a 3/8-inch drive ratchet, extension bar, or other accessory. It measures 1-1/2 inches long and weighs 0.8 ounces. The 14N993 has a tensile strength of 100,000 PSI. It is manufactured in Taiwan and comes with a lifetime warranty from Westward, a Grainger brand.