Hard-to-find hex driver impact sockets in ultra-durable Chrome-Molybdenum steel * Comes with 7 sockets in most commonly-used Metric sizes in 3/8-inch drive * Sizes: 4, 5, 6, 7, 8, 10 and 12mm * Corrosion-resistant black-oxide finish, laser-etched size markings * Complete in custom-fit ABS storage and carry case