"With 29 chrome molybdenum alloy steel jumbo impact sockets ranging from 3/4in. to 2 1/2in. in a heavy-duty blow-mold case with wheels, you'll be ready for any job. Material Type Chrome molybdenum, Pieces qty. 29, Point 6, Measurement Type Standard SAE, Drive in. 3/4, Storage Type Plastic case, SAE Socket Size in. 3/4-2 1/2, Specialized Pieces qty. 0."