This VEVOR 21-piece 1-inch drive impact socket set is built for high-torque work on large fasteners using SAE shallow sockets from 1-5/8 in to 3-1/8 in. Made from heat-treated CR-V alloy steel with a black phosphate finish, it is designed to resist rust, oil, and corrosion while handling heavy impact loads. The 6-point socket design improves grip and helps reduce fastener rounding under high torque. Laser-etched size markings make identification easier in low-light conditions. A sturdy carrying case keeps sockets and accessories organized for transport and storage. Includes 24 in. ratchet, 8 in. extension bar, 18 in. extension bar, and 20 in. sliding T-bar.