Premium tools and an organized workspace are the marks of professionals and serious home do it yourselfers. The Powerbuilt 16 Piece Pro Tech Metric Combination Wrench Set provides both. This 16-piece set is a professional-level wrench set and a tray designed to drop into any standard toolbox drawer. The combination wrenches have chamfered edges on both open and box ends for easier mating and reducing slippage on fasteners. The box end also features Z-Drive™ broaching for a stronger grip on fasteners. All wrenches are made of premium Chrome Vanadium steel with a mirror-polished chrome-plated finish. The wrench set comes in a custom laser-cut EVA foam tray that fits in a box drawer to keep tools organized and secure. Powerbuilt Professional Technician combination wrenches are built to meet or exceed ANSI specifications for length, torque, and hardness.