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