Gearwrench KD84924N 0.38 in. Drive 6 Point Metric Deep Universal Impact Socket Set, 10 piece Deep Flex Socket Design Provides More Reach to Access Restricted Fasteners. Made From Chrome Molybdenum Alloy Steel for Exceptional Strength and Durability. Surface Drive Technology for Reduced Fastener Rounding. Manganese Phosphate Coating for Corrosion Resistance. High-Visibility Laser Etched Markings for Quick Size Identification.