Quantity: One Set (9 Pieces) Material: S2 Chrome Vanadium Steel What Youll Get: You will receive 9 ball head Allen keys in sizes 1.5mm, 2mm, 2.5mm , 3mm, 4mm, 5mm, 6mm, 8mm, 10mm. Precisely sized, the beveled end inserts smoothly into the loop to reduce wear. Premium Materials: The allen wrench set is constructed from extremely hardened and heat treated S2 chrome vanadium steel, providing a durability, corrosion and rust protection for a long service life. Ball head design: the end of the hex wrench is short and flat, and the force range is wider and saves work. The ball head is designed with a long end and can be tilted within 25 or in tight spaces. Chrome Surface: The surface of the allen wrench set is bright chrome, and the surface is treated with powder coating color, non-slip and not easy to scratch. The striking appearance of the color is easily recognizable. Wide range of applications: Allen shank wrench set is used to remove and install most hex screws in furniture, appliances, auto repair, mechanical engineering, bicycle repair, mold repair, musical instrument repair, musical instrument repair, etc.