"The Chicago Pneumatic line of premium high-performance sockets combine strength, durability, looks and top quality. From tough, chrome-moly steel construction to the laser-etched, easy-to-read socket size, these are the only impact sockets you'll ever need. SAE Deep Socket Size in. 7/8-1 1/2, Measurement Type Standard SAE, Point 6, Storage Type Plastic case, Material Type Chrome molybdenum, Pieces qty. 8, Specialized Pieces qty. 0, Drive in. 1."