This flip side dual-end socket set features all 6 commonly useful sizes. Made from high-quality, heat-treated Chrome-Molybdenum alloy steel. Treated with a rustproof and corrosion-resistant Manganese Phosphate coating. With laser-etched sizes, easy to identify when using. 3pc set including: 2pc dual-end socket: 18.5/19.5/20.5/21.5 mm 1pc 3"/75mm length Extension Bar |