"Ingersoll Rand Impact Sockets are built to handle your toughest high-torque applications. These sockets are made of chrome-molybendum steel and feature laser-etched size labeling to ensure durability and easy size identification in any work environment. Pieces qty. 13, Drive in. 1/2, Measurement Type Standard SAE, Specialized Pieces qty. 0, SAE Socket Size in. 7/16-1 1/4, Storage Type Plastic case, Point 6, Material Type Chrome molybdenum. Chrome-molybendum steel & lifetime warranty ensure a long life Laser-etched size labeling allows easy size identification, helping you get through your project efficiently"