Heat treated Chrome Vanadium Steel ensures durability and extreme strength. SuperKrome Plating delivers the toughest finish with a high-polish plating which results in a jewelry-like finish, providing long life and maximum corrosion resistance. Socket sizes include: 3/8" - 1" and 10MM - 24MM with visible size markings and color-coded rings for easy identification. Tools Include: 1/2" Drive 216-poition ratchet, 3" & 5" extensions, and universal joint. The SureGrip drive design drives the side of the fastener, not the corner, to provide increased strength and avoid rounding or damage to the fasteners. EVA foam storage tray to keep tools organized, protected, and accessible. Your job isn’t an easy one. It takes tough tools to get it done, but even the toughest tools can take a beating. That’s why we stand behind a lifetime warranty on each of our products.