Impact drivers rely on strong sockets to withstand repetitive contact with heavy-duty applications while loosening or securing hardware and Craftsman?s 12-piece. Laser Impact Socket Set, 1/2 inch drive (Metric) boasts strong and durable alloy steel construction. The set includes metric sockets sizes 12-19, 21-22, 24 and 27. Backed by a lifetime warranty, you?ll appreciate these sockets project after project, as they deliver the strength you need to pry off lug nuts and gain a secure grip when tightening hardware. Stop squinting to identify the size of your sockets with the Craftsman 12-piece. Laser Impact Socket Accessory Set, 1/2 inch drive ? metric. Each socket features laser-etched size markings, which are sure to save you time and hassle during your project. This set also includes a convenient storage case, making organizing your sockets a breeze.