The CRAFTSMAN CMMT99222 & CMMT99292 adapters are high-quality hand tools designed for automotive use. These standard socket adapters are both SAE and metric in measurement, featuring a chrome surface finish for durability. The 3/8" and 1/2" sizes make them versatile for various applications, while the lifetime warranty ensures long-lasting performance. With a single adapter included in the set, these tools are a reliable addition to any mechanic's toolbox, providing a seamless drive type for efficient work.