Hex driver impact sockets in drop forged black chrome-molybdenum steel * Set with 7 sockets in SAE sizes with 3/8-inch drive * Most commonly used sizes: 3/16, 7/32, 1/4, 5/16, 3/8, 7/16, 1/2-inch * Size markings engraved on each individual impact socket * Heavy duty carrying/storage case included