Crafted from heat-treated CrMo steel, this 3-piece Tolsen Impact Socket Set offers exceptional strength and durability. Each deep hex socket features a color oxidation treatment—blue for 17mm, gold for 19mm, and red for 21mm—ensuring easy size identification. Equipped with protective PP covers, these sockets are designed for use with air, electric, or manual impact wrenches, delivering reliable performance in demanding applications.