These unique socket adapters allow you to reduce the drive of your sockets without increasing your tool height. The low profile design allows for use in a wide range of applications. Allows you to reduce from 3/4″ drive to 1/2″, 1/2″Drive to 3/8″ or from 3/8″ drive to 1/4″ without making your ratchet and socket a lot higher than it is.