Bit constructed with high-grade chrome-vanadium alloy steel; chrome-mirror finish * A complete set with 32-pieces of most commonly used hex bit in SAE and Metric sizes * Set comes in 1/4-inch, 3/8-inch, 1/2-inch drive (in SAE and Metric) * A complete hex socket set that will fit 99% of hex socket, perfect for various applications * Set completes with a durable storage case