The Tolsen 20048 is a 9-piece long arm hex key set designed to handle metric hexagonal fasteners, especially in those awkward, hard-to-reach places where standard keys can't reach. Each tool is crafted from heat-treated chrome vanadium steel and finished with a satin chrome plating, which helps the set resist wear and corrosion over time. This collection includes a versatile range of sizes from 1.5mm up to 10mm, providing the right fit for a variety of home repairs or professional tasks. Weighing 360g and measuring 270 x 100 x 30 mm, the set comes organized on a blister card, making it easy to store in a toolbox or hang in a workshop for quick access.