This 3-piece socket adapter set from HART is perfect for any DIY mechanic. The set includes adapters in 1/4-, 3/8-, and 1/2-inch sizes, allowing for versatile use with a variety of tools. The adapters are made from high-quality materials and come with a 3/8in. drive size, making them compatible with many different tools. The set is sold as a complete unit and includes a California Proposition 65 Warning. Whether you're a professional mechanic or just starting out, this socket adapter set is a must-have for any tool collection.