The PROTO® 558PC Metric Master Set by Irwin is a comprehensive tool collection designed for professionals and serious DIY enthusiasts. This extensive set includes 558 pieces, featuring a wide range of sockets, wrenches, and accessories, all crafted from high-quality materials for durability and performance. Each tool is designed to meet or exceed ANSI standards, ensuring reliability in demanding applications. The organized storage case allows for easy access and transport, making it ideal for on-the-go use. Perfect for automotive, industrial, and general repair tasks, this master set is a must-have for any toolbox.