• Metric impact socket set features the most frequently used sizes: 8 mm, 10 mm, 12 mm, 13 mm, 14 mm, 15 mm, 17 mm, 18 mm, and 19 mm • Engineered with optimized wall thickness and precision hex pockets to securely grip fasteners and provide quick access • Convenient carabiner attachment lets you secure the socket sleeve to backpacks, tool bags, or belts for instant access and improved job site productivity • Long lasting, industry-standard color-coded painted rings and bold stamped size and high contrast paint infill size markings to quickly identify socket sizes • Superior cold forged, heat treated Cr-Mo steel construction provides impact-rated strength designed to withstand high-torque jobs • Socket sleeve features a mechanical grip system around the color band for secure socket retention; easy removal for rapid socket changes • Includes 3-Inch impact adapter for compatibility with 1/4-Inch impact drivers