Features and Benefits Ball end on long arm allows up to 25 angle of entry for use in hard to reach areas; Allows faster insertion and removal of screws; Chamfered straight hex tip on short arm for more torque and leverage to remove stubborn screws; Chrome molybdenum steel construction for strength and durability; Mirror polished chrome plated finish resists corrosion; This extra long ball end hex key set includes the following sizes: .1.5mm, 2mm, 2.5mm, 3mm, 4mm, 5mm, 6mm, 8mm and 10mm. Other features include: Patent pending textured finish for improved grip, Color coding for easy identification, and Laser etched size markings that are easy to read. Lifetime warranty.