The Powerbuilt 152-piece master mechanic’s service set is a complete high-quality toolset that covers most automotive maintenance, repairs, and installations. It includes a comprehensive selection of 1/4, 3/8 and 1/2 inch drive shallow and deep sockets in both SAE and metric. The Z-Drive design sockets provide superior grip on fastener's flat edges preventing rounding and slippage. Includes 3 premium 72 tooth sealed head reversible ratchets made from Chrome Vanadium steel with mirror polished finish and comfortable contoured handles. Set also includes Metric and SAE extra-long reach combination wrenches, hex keys, pinner handle with bits, socket extensions, universal joint and adapters. Precision-constructed tools all meet or exceed ANSI standards and have a lifetime warranty.