The Grainger 14N241 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 is rated up to 20,000 psi torque and meets ANSI standards. The overall length of the adapter is 1-1/2 inches.