The Milwaukee SHOCKWAVE Impact Duty steel is a high-quality alloy steel designed for ultimate strength and durability. It features a ball detent design for superior impact socket retention. This set includes four impact socket adaptors from the Milwaukee SHOCKWAVE™ impact duty range, made from chrome-molybdenum for strength and durability. The adaptors have stamped and ink-filled diameter markings that are resistant to wear. The set includes the following adaptors: 3/8"SQ - 1/4"SQ, 3/8"SQ - 1/2"SQ, 1/2"SQ - 3/8"SQ, and 1/2"SQ - 3/4"SQ. The sockets are engineered for accessibility in confined spaces, prioritizing longevity and enduring performance. They also feature laser-etched part numbers for wear resistance, a dual hole design and groove for enhanced security with accessories, and a pin-less design for increased durability.