COMFORTABLE GRIP: The Performance Tool W30908 Nut Driver features oversized fluted handles that provide comfort and maximum grip, making it easy to use for extended periods of time. DURABLE CONSTRUCTION: Made from high-quality chrome vanadium steel, this nut driver is built to last. It also features a corrosion-resistant chrome plating, ensuring it stays in good condition even after extended use. HOLLOW SHAFTS: The hollow shafts of this nut driver provide easy access to nuts and bolts in tight spaces, making it a versatile tool to have in your toolbox. METRIC MEASUREMENTS: With an 8mm size, this nut driver is perfect for working with metric nuts and bolts commonly found in automotive and industrial applications. US PATENTED DESIGN: This nut driver features a unique design that is protected by a US Patent Number D693201, ensuring that you have a high-quality tool that is both effective and innovative.