1 in. Drive SAE & Metric Truck Service Impact Set, 10 Pc.This rugged set of dual SAE metric impact sockets is made of chrome molybdenum for durability and long performance life. The six point sockets in this impact socket set feature high visibility laser etched markings for fast selection. This dual SAE metric impact socket set stands up to the force of impact drivers. High visibility laser etched markings for easier socket selection Chrome molybdenum construction Black oxide coated to prevent corrosion